CVE-2026-29777CWE-74

Traefik has a kubernetes gateway rule injection via unescaped backticks in HTTPRoute match values

Medium · published March 11, 2026

CVSS v4.0
6.1
EPSS
0%
Percentile
32.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.1 · MEDIUM
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
EPSS
0.00394 · 32.4th percentile
Weakness
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published
2026-03-11T15:54Z
EPSS history
Timeline
  • 11 MAR 15:54Z
    Traefik has a kubernetes gateway rule injection via unescaped backticks in HTTPRoute match values
    cvelistv5