Vulnerability in Traefik
CVE-2026-44774
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (44.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.001
Affected products
- Traefik — versions < 2.11.46, >= 3.0.0-beta1, < 3.6.17, >= 3.7.0-rc.0, < 3.7.1
Weakness classification (CWE)
References
- https://github.com/traefik/traefik/security/advisories/GHSA-96qj-4jj5-wcjc (Exploit, Patch, Vendor Advisory)
- https://github.com/traefik/traefik/releases/tag/v2.11.46 (Product, Release Notes)
- https://github.com/traefik/traefik/releases/tag/v3.6.17 (Product, Release Notes)
- https://github.com/traefik/traefik/releases/tag/v3.7.1 (Product, Release Notes)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-44774?
- CVE-2026-44774 is a critical-severity vulnerability in Traefik, classified under Improper Access Control. CVSS score: 9.9/10. Published 2026-05-15.
- How severe is CVE-2026-44774?
- Critical severity. CVSS v3 base score is 9.9 out of 10.