Incorrect Authorization Affecting traefik-3 package, versions <3.7.7-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.27% (20th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-TRAEFIK3-18590657
  • published8 Aug 2026
  • disclosed22 Jul 2026

Introduced: 22 Jul 2026

NewCVE-2026-65601  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Minimos:latest traefik-3 to version 3.7.7-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream traefik-3 package and not the traefik-3 package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules[].backendRefs[].filters[].extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route author holding a ReferenceGrant for a cross-namespace Service could therefore bind a Traefik Middleware from the backend namespace without a separate grant for that middleware, potentially injecting trusted reverse-proxy identity headers into downstream requests. The issue is fixed in version 3.7.7.

CVSS Base Scores

version 3.1