CVSS 4.0
6.4 mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:HCVE-2026-44774
Medium (6.4) in traefik traefik. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in github.com/traefik/traefik/v3 3.6.17, 3.7.1.
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.
Severity
CVSS 3.1
9.9 criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-284, CWE-15
- Published
- Modified
- Record from
- the NVD, synced
Affected
- traefik:traefik
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-96qj-4jj5-wcjc | Go | github.com/traefik/traefik/v3 | >=3.7.0 <3.7.1 | 3.7.1 |
| GHSA-96qj-4jj5-wcjc | Go | github.com/traefik/traefik/v3 | <3.6.17 | 3.6.17 |
| GHSA-96qj-4jj5-wcjc | Go | github.com/traefik/traefik/v2 | <2.11.46 | 2.11.46 |
| GHSA-96qj-4jj5-wcjc | Go | github.com/traefik/traefik | <=1.7.34 | no fix published |
| GO-2026-5277 | Go | github.com/traefik/traefik | all versions | no fix published |
| GO-2026-5277 | Go | github.com/traefik/traefik/v2 | <2.11.46 | 2.11.46 |
| GO-2026-5277 | Go | github.com/traefik/traefik/v3 | <3.6.17 >=3.7.0 <3.7.1 | 3.6.17, 3.7.1 |