CVE-2026-44774 Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false
A low-privileged user can bypass REST provider security settings to gain unauthorized write access to Traefik's dynamic configuration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-44774?
CVE-2026-44774 is a medium-severity missing authorization vulnerability in Traefik Traefik, published on 15 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Traefik is an HTTP reverse proxy and load balancer. Prior to 2.11.46, 3.6.17, and 3.7.1, Traefik's Kubernetes Gateway API provider allows a tenant with HTTPRoute creation permissions to expose the REST provider handler, bypassing the providers.rest.insecure=false setting. The Gateway provider accepts any TraefikService backend reference whose name ends with @internal, making it possible to route traffic to rest@internal in addition to the intended api@internal. In shared Gateway deployments where the REST provider is enabled, this allows a low-privileged actor to gain live dynamic configuration write access to Traefik, enabling unauthorized reconfiguration of routers and services. This vulnerability is fixed in 2.11.46, 3.6.17, and 3.7.1.
Which versions are affected by CVE-2026-44774?
11 open source packages ship an affected version, including github.com/traefik/traefik/v3, github.com/traefik/traefik and github.com/traefik/traefik/v2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/traefik/traefik/v3 Go | All versions | 3.6.17, 3.7.1 |
github.com/traefik/traefik/v3 Go | All versions | 3.6.17 |
github.com/traefik/traefik/v3 Go | All versions | 3.6.17 |
github.com/traefik/traefik/v3 Go | From 3.7.0 | 3.7.1 |
github.com/traefik/traefik/v3 Go | From 3.7.0 | 3.7.1 |
github.com/traefik/traefik Go | All versions | None |
5 more packages
github.com/traefik/traefik Go | All versions to 1.7.34 | None |
github.com/traefik/traefik Go | All versions to 1.7.34 | None |
github.com/traefik/traefik/v2 Go | All versions | 2.11.46 |
github.com/traefik/traefik/v2 Go | All versions | 2.11.46 |
github.com/traefik/traefik/v2 Go | All versions | 2.11.46 |
Linux distribution packages (2)
traefik openSUSE:Tumbleweed | All versions | 3.6.17-1.1 |
traefik2 openSUSE:Tumbleweed | All versions | 2.11.46-1.1 |
Products include Traefik Traefik.
How do I fix CVE-2026-44774?
Upgrade github.com/traefik/traefik/v3 to a fixed version for your release line: 3.6.17 or 3.7.1.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-44774 being exploited?
There is no known exploitation of CVE-2026-44774 in the wild and no public exploit code.
Other vulnerabilities in Traefik Traefik
- CVE-2024-45410 HTTP client can remove the X-Forwarded headers in Traefik
- CVE-2026-88877 Traefik v3.7.0 Authentication Bypass via from-to-www-redirect
- CVE-2026-85595 Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth
- CVE-2026-88007 Traefik HTTP/3 Backend NTLM Connection Reuse
- CVE-2026-88009 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging
Sources
Also known as CLEANSTART-2026-PG87313, GHSA-96qj-4jj5-wcjc, GO-2026-5277, MINI-83q9-fgj2-hrmh, MINI-x259-rrhm-m8h3, MINI-xpwq-9wrg-q98c and 2 more.