CVE-2026-114635

Traefik before v2.11.58 and v3.7.14 contains an authentication bypass vulnerability in its SNI check, which is skipped when request TLS state is nil. Unauthenticated clients can send HTTP/2 requests with the :scheme http pseudo-header over TLS on Go 1.27 builds to reach routers requiring client certificates without presenting one.

Score

CVSS 3.1 8.7 High

Status

Analyzed - disclosure@vulncheck.com

Published

2026-10-22

Last modified

2026-10-27

Weaknesses

CWE-288

Affected products

• Traefik (Traefik)

References

• https://github.com/traefik/traefik/security/advisories/GHSA-fh26-gfpp-7xxx
• https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-sni-check-bypass-via-http-2-scheme