| Name | CVE-2026-115557 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| python3.11 (PTS) | bookworm | 3.11.2-6+deb12u8 | vulnerable |
| bookworm (security) | 3.11.2-6+deb12u9 | vulnerable |
| python3.13 (PTS) | trixie | 3.13.5-2+deb13u5 | vulnerable |
| forky, sid | 3.13.15-1 | vulnerable |
| python3.14 (PTS) | forky | 3.14.8-1 | vulnerable |
| sid | 3.14.9-1 | vulnerable |
| python3.15 (PTS) | forky | 3.15.0-1 | vulnerable |
| sid | 3.15.1-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| python3.11 | source | (unstable) | (unfixed) | unimportant | | |
| python3.13 | source | (unstable) | (unfixed) | unimportant | | |
| python3.14 | source | (unstable) | (unfixed) | unimportant | | |
| python3.15 | source | (unstable) | (unfixed) | unimportant | | |
Notes
https://github.com/python/cpython/issues/160040
https://github.com/python/cpython/pull/160042
Security feature work, not a vulnerability itself