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Haskell Programming Language CVE debriefs

These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.

CRITICAL Haskell Programming Language CVE published 2026-06-11

CVE-2026-9648

The crypton-x509-validation Haskell library fails to enforce X.509 NameConstraints, allowing TLS clients to accept certificates whose Subject Alternative Names fall outside the issuing CA’s permitted subtrees. This oversight enables an attacker who compromises a name-constrained sub-CA to impersonate domains beyond its intended scope.