9.9

CVE-2026-44774: Traefik: Gateway API TraefikService backend accepts rest@internal, allowing unauthorized exposure of the REST provider despite providers.rest.insecure=false

Modified
AliasesGHSA-96qj-4jj5-wcjcGO-2026-5277openSUSE-SU-2026:10810-1
Published 15-05-2026Last modified 13-08-2026

Vulnerability summary

CVE-2026-44774 is a critical (CVSS 9.9) Improper Access Control vulnerability in traefik. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 40.5% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Routine

Not severe (CVSS 6.4, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
9.9/10
010
Critical · v3.1 (NVD)
EPSS score
0.47%
0%100%
Low · -0.08 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:21483-1

Timeline

  1. 15-05-2026
    PublishedVulnerability first disclosed.
  2. 13-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 3 sources · 2 versions

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

Decrease -0.08 pp

From 0.55% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • githubUnverified

    Traefik

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Github.com/traefik/traefik2 products
  • v2< 2.11.46
  • v3< 3.6.17 | ≥ 3.7.0, < 3.7.1
Opensuse2 products
  • traefik2&distro=openSUSE Tumbleweed< 2.11.46-1.1
  • traefik&distro=openSUSE Tumbleweed< 3.6.17-1.1
Github.com/traefik1 product
  • traefik≤ 1.7.34 | All versions (No fix recorded)
Traefik1 product
  • traefik≥ 3.0.0-beta1, < 3.6.17 | ≥ 3.7.0-rc.0, < 3.7.1 | < 2.11.46 | ≥ 3.0.0, < 3.6.17 | ≥ 3.7.0, < 3.7.1

4 vendors · 6 products

References

11 links
Show all 11 references