PT-2026-122608

CVE-2026-115557

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Published

2026-10-24

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Updated

2026-10-24

Description by

CVSS 4.0
9.4
Critical
MetricsAV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
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.
Exploitability
Fix
Vendors
Affected products
Weakness enumeration
CWE-299: Improper Check for Certificate Revocation
Related identifiers
CVE-2026-115557
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