CVE-2026-29777
Fixed in a distro release EPSS <1%CVSS 6.1
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.
Products: traefik
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Go | github.com/traefik/traefik | no fix |
| Go | github.com/traefik/traefik/v2 | no fix |
| Go | github.com/traefik/traefik/v3 | 3.6.10 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | traefik-2.11 | 2.11.42-r0 |
| Chainguard | traefik-2.11 | 2.11.41-r0 |
| Chainguard | traefik-3.5 | no fix |
| Chainguard | traefik-fips-2.11 | 2.11.41-r0 |
| Chainguard | traefik-fips-3.5 | no fix |
| openSUSE:Leap 15.6 | govulncheck-vulndb | 0.0.20260317T205859-150000.1.152.1 |
| openSUSE:Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 |
| openSUSE:Tumbleweed | traefik | 3.6.10-2.1 |