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Fencer Vulns
high 8.3

CVE-2026-44774 json

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

published 2026-05-13 5 mo ago modified 2026-08-13 2 mo ago also EUVD-2026-30566 , GHSA-96qj-4jj5-wcjc , GO-2026-5277

cvss
8.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/traefik/traefik/v3 3.6.17, 3.7.1
  • go github.com/traefik/traefik/v2 2.11.46
  • Red Hat Red Hat OpenShift Dev Spaces 3.29 1782403274
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
  • traefik openSUSE Tumbleweed 3.6.17-1.1
  • traefik2 openSUSE Tumbleweed 2.11.46-1.1

opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2026:10810-1openSUSE-SU-2026:10811-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-44774 updated cvss 8.3

traefik: Traefik: Privilege escalation via Kubernetes Gateway API provider configuration bypass

  • Red Hat OpenShift Dev Spaces 3.29 devspaces/traefik-rhel9 1782403274
    fixed: vendor fix RHSA-2026:36820
  • Red Hat OpenShift Dev Spaces 3.29 devspaces/udi-rhel9 1782991491, devspaces/code-rhel9 1782498475, devspaces/server-rhel9 1783033397, devspaces/openvsx-rhel9 1783007534, devspaces/udi-base-rhel9 1782987705, devspaces/code-sshd-rhel9 1782497670, +10 more Red Hat OpenShift GitOps openshift-gitops-1/argo-rollouts-rhel8, openshift-gitops-1/argo-rollouts-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/traefik/traefik/security/advisories/GHSA-96qj-4jj5-wcjc referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 6.4 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:H
CISA ADP 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
CNA 4.0 6.4 CVSS: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
NVD 3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CNA 3.1 8.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/traefik/traefik/v3
>=3.7.0, <3.7.1
<3.6.17
3.7.1
3.6.17
go github.com/traefik/traefik/v2
<2.11.46
2.11.46
go github.com/traefik/traefik
<=1.7.34
all versions
 no fix listed

Affected products

  • traefik traefik
  • Red Hat Red Hat OpenShift Dev Spaces 3.29
  • Red Hat Red Hat OpenShift GitOps

Classification

Weakness
  • CWE-284 Improper Access Control
  • CWE-15 External Control of System or Configuration Setting

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.