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[3.14] gh-160040: Distrust compromised eMudhra intermediate CA keys (CVE-2026-115557) (GH-160042) - #160569
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…keys (CVE-2026-115557) (pythonGH-160042) The ssl module now rejects TLS certificate chains that contain any of a set of compromised eMudhra intermediate CA keys. This is an extraordinary measure and a last line of defense: removing trust is primarily the job of the platform root store, and the built-in denylist only blocks connections while that update has not yet reached the OS, a container image, or a bundled trust store in various Python packages. Entries are added to the denylist only under a very high threshold. The denylist matches on the public key (the SHA-256 digest of the RFC-5280 SubjectPublicKeyInfo), so it also covers the cross-signed certificates that reuse one of the distrusted keys. --------- Signed-off-by: Christian Heimes <christian@python.org> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com> (cherry picked from commit 7dd8b47) Co-authored-by: Christian Heimes <christian@python.org>
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(cherry picked from commit 7dd8b47)
Co-authored-by: Christian Heimes christian@python.org
Manual backport notes (3.14):
Makefile.pre.inandPCbuild/_ssl.vcxproj{,.filters}conflicted only because main also listsModules/_openssl_mem.h(gh-156228, main-only). Resolved by adding justModules/_ssl/distrusted_spki.h; the filters file also gains theHeader Filesfilter definition (same GUID as main) since 3.14 had no headers listed. All other files are identical to the main commit.test_ssl,test_asyncio.test_sslandtest_asyncio.test_sslprotopass, includingtest_distrusted_spki.