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A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A rem…

High CVSS 7.4
CVECVE-2026-42011
First seen2026-07-20 16:15 UTC
Disclosed2026-05-07 15:16 UTC
Last updated2026-07-20 16:15 UTC
Channel statusauto

Summary

A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Lint boundary warnings (1)

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-6

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD