Gnutls: gnutls: security bypass due to incorrect name constraint handling
cve-program · CVE-2026-42011 · Published
No access to your tenant or devices. Every item links to its source. What this means
Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.
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.
Read the publisher's advisorySee how the publisher's advisory changed over time. Each link opens the version saved at that time. The publisher's update date can differ from the date shown here.
Each link identifies one complete publisher record. History can include advisories that previously shared an identifier; an identifier removed by a publisher no longer establishes a current relationship. A historical link shows only that record and earlier saved versions. Failed checks and unchanged reads do not create new versions.
cve-program · CVE-2026-42011 · Published
This historical link shows only this version and versions saved before it. Browse all advisory history.