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Distrust compromised intermediate certificates in ssl module

Exact source revision recorded 24 Oct 2026 20:17:04 UTC. It does not establish the source's current position. Latest evidence.

cve-program · CVE-2026-115557

Published

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 published
24 Oct 2026 14:15:14 UTC
Source modified
24 Oct 2026 18:07:53 UTC
Observed here
24 Oct 2026 20:17:04 UTC
Source terms
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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 9.4 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

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Sources read 26 Oct 08:27 UTC · 272 of 272 readable · 270 fully read · documentation 469/469 current