Critical
Distrust compromised intermediate certificates in ssl module
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.
Announced Source revision 1
Original source ↗CVE-2026-115557
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-115557
CPython
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/python/cpython",
"vendor": "Python Software Foundation",
"modules": [
"ssl"
],
"product": "CPython",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "3.16.0",
"versionType": "python"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-115557
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #56689 · Revision 1
- Added to Heist Feed
- Publisher date