High 7.5Published Feb 21, 2024

CVE-2024-26130cryptography is a package designed to expose cryptographic primitives and recipes to Python developers.

Updated under an hour ago (Nov 2, 2026, 1:40 AM ET)

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No exploitation reported and no EPSS estimate yet.

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cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Starting in version 38.0.0 and prior to version 42.0.4, if `pkcs12.serialize_key_and_certificates` is called with both a certificate whose public key did not match the provided private key and an `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`, then a NULL pointer dereference would occur, crashing the Python process. This has been resolved in version 42.0.4, the first version in which a `ValueError` is properly raised.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

cryptography.io cryptography cryptography.io:cryptography	from 38.0.0 before 42.0.4	NVD

References

References

https://github.com/pyca/cryptography/commit/97d231672763cdb5959a3b191e692a362f1b9e55	patch
https://github.com/pyca/cryptography/pull/10423	issue-tracking, patch
https://github.com/pyca/cryptography/security/advisories/GHSA-6vqw-3v5j-54x4	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.