{"id":"CVE-2024-26130","aliases":["GHSA-6vqw-3v5j-54x4","PYSEC-2024-225"],"title":"cryptography NULL pointer dereference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private …","summary":"cryptography NULL pointer dereference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash override","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","vendor":"cryptography","product":"cryptography","ecosystem":"pip","affected":["cryptography >= 38.0.0, < 42.0.4"],"patched":["cryptography 42.0.4"],"published":"2024-02-21","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:09.815640629Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-6vqw-3v5j-54x4","references":[{"url":"https://github.com/pyca/cryptography/security/advisories/GHSA-6vqw-3v5j-54x4"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26130"},{"url":"https://github.com/pyca/cryptography/pull/10423"},{"url":"https://github.com/pyca/cryptography/commit/97d231672763cdb5959a3b191e692a362f1b9e55"},{"url":"https://github.com/pyca/cryptography"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2024-225.yaml"}],"tags":["osv","pip"],"epss":0.00831,"epssPercentile":0.55593,"ingestedAt":"2026-09-12T03:13:01.668Z","slug":"CVE-2024-26130","body":"## Overview\n\nIf `pkcs12.serialize_key_and_certificates` is called with both:\n\n1. A certificate whose public key did not match the provided private key\n2. An `encryption_algorithm` with `hmac_hash` set (via `PrivateFormat.PKCS12.encryption_builder().hmac_hash(...)`\n\nThen a NULL pointer dereference would occur, crashing the Python process.\n\nThis has been resolved, and now a `ValueError` is properly raised.\n\nPatched in https://github.com/pyca/cryptography/pull/10423\n\n## Affected packages\n\n- `cryptography >= 38.0.0, < 42.0.4`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `cryptography 42.0.4`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}