CVE-2026-88009
Fixed in a distro release EPSS <1%CVSS 8.8
Traefik is an open source HTTP reverse proxy and load balancer. Prior to 2.11.57, and 3.7.13, Traefik accepts a rootless HTTP/1 request target that Go stores in URL.Opaque while leaving URL.Path empty. The rewriteRequestBuilder path evaluates routing, path sanitization, forwardAuth, encodedCharacters, and access logging against a path normalized to / but forwards URL.Opaque verbatim to the backend, allowing cross-vhost routing bypass, path-scoped authorization bypass, and access-log evasion when the backend interprets the opaque target as a path. This issue is fixed in 2.11.57 and 3.7.13.
Products: traefik
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Go | github.com/traefik/traefik | no fix |
| Go | github.com/traefik/traefik/v2 | 2.11.57 |
| Go | github.com/traefik/traefik/v3 | 3.7.13 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | traefik-3.6 | no fix |
| Chainguard | traefik-fips-3.6 | no fix |
| SUSE Linux Enterprise Server 16.0 | govulncheck-vulndb | 0.0.20260916T180043-160000.1.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | govulncheck-vulndb | 0.0.20260916T180043-160000.1.1 |
| Wolfi | traefik-3.6 | no fix |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260916T180043-160000.1.1 |
| openSUSE Tumbleweed | traefik | 3.7.13-1.1 |