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CVE-2026-115557 (CRITICAL): Python CPython ssl module accepted compromised certs when revocation was misconfigured. Fix: versions >3.16.0 auto-reject known bad certs via denylist. Patch now. https://radar.offseq.com/threat/cve-2026-115557-cwe-299-improper-check-for-certificate-revocation-in-python-software-foundation-cpython-fb92d56c9f38c582 #OffSeq #Python #CVE #SSL #AppSec

Critical threat: CVE-2026-115557: CWE-299 Improper check for certificate revocation in Python Software Foundation CPy

OffSeq Threat RadarCVE-2026-115557: CWE-299 Improper check for certificate… | Threat RadarCVE-2026-115557 is a critical vulnerability in the Python Software Foundation's CPython implementation affecting versions from 0 up to and including 3.16.0. It…

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Oct 25, 2026 · 06:00 UTC

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