Vulnerability

[ Description ]Official description

Incomplete X.509 implementation in GnuTLS v3.8.13 allows attackers controlling a subordinate Certificate Authority to bypass cross-domain PKI restrictions and issue unauthorized certificates.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund8 Oct 2026WID-SEC-2026-3843

  GnuTLS: Multiple vulnerabilities Translated from German

  CVE-2026-95210CVE-2026-95209CVE-2026-95184+3 more CVEs

[ References ]References

• gist.github.com/lkloliver/1f2a97cb8d0b31aa27b6bd0354358d7d
• www.rfc-editor.org/rfc/rfc5280
• www.rfc-editor.org/rfc/rfc5280