CVE-2026-44774
published 2026-05-15CVE-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…
PriorityP265critical9.9CVSS 3.1
AVNACLPRLUINSCCHIHAH
EPSS
0.46%
36.3th percentile
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.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| devspaces | traefik-rhel9 | — | — |
| github.com | traefik_traefik | 0 – 1.7.34 | — |
| github.com | traefik_traefik_v2 | >= 0 < 2.11.46 | 2.11.46 |
| github.com | traefik_traefik_v3 | >= 0 < 3.6.17 | 3.6.17 |
| github.com | traefik_traefik_v3 | >= 3.7.0 < 3.7.1 | 3.7.1 |
| traefik | traefik | < 2.11.46 | 2.11.46 |
| traefik | traefik | — | — |
| traefik | traefik | — | — |
| traefik | traefik | >= 3.0.0 < 3.6.17 | 3.6.17 |
| traefik | traefik | >= 3.7.0 < 3.7.1 | 3.7.1 |
Detection & IOCsextracted from sources · hover to see the quote
- →Detect HTTPRoute resources referencing a TraefikService backend whose name ends with '@internal' — specifically 'rest@internal' — which indicates exploitation of this bypass ↗
- →Monitor for unexpected live dynamic configuration write activity via the Traefik REST provider handler in shared Gateway deployments, which may indicate unauthorized reconfiguration of routers and services ↗
- →Audit Kubernetes RBAC for low-privileged principals with HTTPRoute creation permissions in namespaces where Traefik runs with the Kubernetes Gateway API provider, as this is the required precondition for exploitation ↗
- →Flag any TraefikService backend references to '@internal' handlers from untrusted sources as a potential exploitation indicator ↗
- ·The 'providers.rest.insecure=false' setting is bypassable via this vulnerability; do not rely on it alone as a security control in shared Gateway deployments until patched ↗
- ·Vulnerable Traefik versions are prior to 2.11.46 (2.x line), 3.6.17 (3.6.x line), and 3.7.1 (3.7.x line); the affected Red Hat package is devspaces/traefik-rhel9 ↗
- ·The REST dynamic configuration provider should be disabled or tightly restricted in shared Gateway deployments as a compensating control ↗
CVSS provenance
nvdv3.19.9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
nvdv4.06.4MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat9.9CRITICAL
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GHSA
Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false
ghsa·2026-05-13
CVE-2026-44774 [MEDIUM] CWE-284 Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false
Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false
## Summary
There is a medium severity vulnerability in Traefik's Kubernetes Gateway API provider that 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 reconfigu
VulDB
Traefik Gateway API TraefikService Backend improper authorization
vuldb·2026-05-13
CVE-2026-44774 [CRITICAL] Traefik Gateway API TraefikService Backend improper authorization
A vulnerability was found in Traefik. It has been rated as critical. This affects an unknown function of the component Gateway API TraefikService Backend. Performing a manipulation results in improper authorization.
This vulnerability is reported as CVE-2026-44774. The attack is possible to be carried out remotely. No exploit exists.
Upgrading the affected component is advised.
Red Hat
traefik: Traefik: Privilege escalation via Kubernetes Gateway API provider configuration bypass
vendor_redhat·2026-05-15·CVSS 9.9
CVE-2026-44774 [CRITICAL] CWE-15 traefik: Traefik: Privilege escalation via Kubernetes Gateway API provider configuration bypass
traefik: Traefik: Privilege escalation via Kubernetes Gateway API provider configuration bypass
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 vulnerab
No detection rules found.
No public exploits indexed.
https://github.com/traefik/traefik/releases/tag/v2.11.46https://github.com/traefik/traefik/releases/tag/v3.6.17https://github.com/traefik/traefik/releases/tag/v3.7.1https://github.com/traefik/traefik/security/advisories/GHSA-96qj-4jj5-wcjchttps://access.redhat.com/security/cve/CVE-2026-44774https://bugzilla.redhat.com/show_bug.cgi?id=2477937https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44774.json
2026-05-15
Published