CVEvulnerability
CVE-2026-115557
9.4 CRITICAL
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-10-24
- Last modified
- 2026-10-27
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 9.4 CRITICAL — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
- Weaknesses
- CWE-299
Description
Python has added a denylist for known compromised certificates to the "ssl" module to ensure user safety even without certificate revocation configured. Known compromised certificates will automatically be rejected regardless of the SSLContext policy configuration.
Related
Weakness · CWE (1)
- CWE-299 Improper Check for Certificate Revocation weakness
References
- http://www.openwall.com/lists/oss-security/2026/10/20/29 www.openwall.com
- https://emudhra.we-have-a-problem.com/ emudhra.we-have-a-problem.com
- https://github.com/python/cpython/commit/21a50891ab4be2e9955239e625ae2b40c6b1854d github.com
- https://github.com/python/cpython/commit/36cd295f32fc9ba19399e01abee91231440a41dd github.com
- https://github.com/python/cpython/commit/48d9b2712cd52206c7a5882d0fdca4863ed65e93 github.com
- https://github.com/python/cpython/commit/7dd8b4736a1419750b94a388e6d158be15836fe6 github.com
- https://github.com/python/cpython/commit/98f0e4ed349f370dc8a00366da1a9797e11c9ed5 github.com
- https://github.com/python/cpython/commit/a17d9ef549008133eadf20689b1f4787902efe5b github.com
- https://github.com/python/cpython/commit/af52b41afa4330fb38583db553631baa2f122f90 github.com
- https://github.com/python/cpython/commit/c7fd7edf7e0d122a3973cf676fae21b6aaa650a8 github.com
- https://github.com/python/cpython/commit/e2a9dd97ef9571c710ac0afaa834c8879aebce78 github.com
- https://github.com/python/cpython/commit/e4500d8a437ee5b988a5410cb9b59d177aa01370 github.com
- https://github.com/python/cpython/commit/e4f63e65a93cf44c14274aa987e644b8c003625e github.com
- https://github.com/python/cpython/commit/e9bf2cf84eebf838a1edaa1c648c2b36345b99d3 github.com
- https://github.com/python/cpython/issues/160040 github.com
- https://github.com/python/cpython/pull/160042 github.com
- https://mail.python.org/archives/list/[email protected]/thread/FNAJMZV6XQYLVPABNINDMF3VF66AYLW4/ mail.python.org
- http://www.openwall.com/lists/oss-security/2026/10/24/5 www.openwall.com