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CVE-2026-44774

Traefik broken access control

9.9 CRITICALPublic exploitEPSS 0.55%
  1. Published15 May 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Traefik≥ 3.0.0 < 3.6.17 · ≥ 3.7.0 < 3.7.1 · < 2.11.46

Remediation

Fixed in
Traefik≥ 3.6.17

References

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Frequently asked

Is CVE-2026-44774 being actively exploited?

CVE-2026-44774 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.55%.

How severe is CVE-2026-44774?

CVE-2026-44774 has a CVSS 3.1 base score of 9.9, rated critical. EPSS estimates a 0.55% probability of exploitation.

Which products are affected by CVE-2026-44774?

Affected products include Traefik.

How do I fix CVE-2026-44774?

Upgrade affected software to a fixed version, for example Traefik 3.6.17 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-44774 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.