What is CVE-2026-114635?

CVE-2026-114635 is a high-severity vulnerability in Traefik, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 8.7/10. Published 2026-10-22.

How severe is CVE-2026-114635?

High severity. CVSS v3 base score is 8.7 out of 10.

Vulnerability in Traefik

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.

Published 2026-10-22 · last modified 2026-10-22.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Traefik

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

github.com/traefik/traefik/security/advisories/GHSA-fh26-gfpp-7xxx (vendor-advisory)
www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-sni-check-bypass… (third-party-advisory)

Frequently asked questions

What is CVE-2026-114635?: CVE-2026-114635 is a high-severity vulnerability in Traefik, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 8.7/10. Published 2026-10-22.
How severe is CVE-2026-114635?: High severity. CVSS v3 base score is 8.7 out of 10.