All vulnerabilities
CVE-2026-114635GHSA-fh26-gfpp-7xxx

Traefik before v2.11.58 and v3.7.14 SNI Check Bypass via HTTP/2 Scheme

traefik traefik
Open in ThreatlineRecord JSON
CVSS
7.0High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.11.58Also 3.7.14CVE List
Published22 Oct 2026Updated 22 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 4

  • traefikaffected: all versions before 2.11.58CVE List
  • traefikunaffected: 2.11.58CVE List
  • traefikaffected: 3.0.0 before 3.7.14CVE List
  • traefikunaffected: 3.7.14CVE List

References 2