Vulnerability · Published Oct 22, 2026 · Assigned by VulnCheck
CVE-2026-114635Traefik before v2.11.58 and v3.7.14 SNI Check Bypass via HTTP/2 Scheme
High 8.7
In plain English
A high-severity authentication bypass in traefik from traefik. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).
Severity (CVSS 3.1)8.7High
Exploit odds (30 days)0.2%top 91.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-288 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
References
- GitHub Security Advisory (GHSA-fh26-gfpp-7xxx) vendor-advisory
- VulnCheck Advisory: Traefik before v2.11.58 and v3.7.14 SNI Check Bypass via HTTP/2 Scheme third-party-advisory