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.

CVSS v3 8.7 HIGH

8.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:traefik:traefik::::::::
	cpe:2.3:a:traefik:traefik::::::::

History

27 Oct 2026, 14:17

Type	Values Removed	Values Added
First Time		Traefik Traefik traefik
References	~~() https://github.com/traefik/traefik/security/advisories/GHSA-fh26-gfpp-7xxx -~~	() https://github.com/traefik/traefik/security/advisories/GHSA-fh26-gfpp-7xxx - Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-sni-check-bypass-via-http-2-scheme -~~	() https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-sni-check-bypass-via-http-2-scheme - Third Party Advisory
CPE		cpe:2.3:a:traefik:traefik::::::::

22 Oct 2026, 02:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-22 02:16

Updated : 2026-10-27 14:17

NVD link : CVE-2026-114635

Mitre link : CVE-2026-114635

CVE.ORG link : CVE-2026-114635

JSON object : View

Products Affected

traefik

traefik

CWE

CWE-288

Authentication Bypass Using an Alternate Path or Channel

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