CVE-2026-29777 MEDIUM

CVE-2026-29777: Traefik has a kubernetes gateway rule injection via unescaped backticks in HTTPRoute match values

Vendor Traefik
Product traefik
Weakness CWE-74
Published March 11, 2026
Last update March 11, 2026

CVSS base score

6.1/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N

What the vulnerability does

01Description

Traefik is an HTTP reverse proxy and load balancer. Prior to 3.6.10, A tenant with write access to an HTTPRoute resource can inject backtick-delimited rule tokens into Traefik's router rule language via unsanitized header or query parameter match values. In shared gateway deployments, this can bypass listener hostname constraints and redirect traffic for victim hostnames to attacker-controlled backends. This vulnerability is fixed in 3.6.10.

Key dates

02Disclosure timeline

March 11, 2026 CVE published
March 11, 2026 Record updated