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CVE-2026-54765 is an incorrect authorization vulnerability in Traefik's Kubernetes Gateway API provider affecting versions 3.7.0 through 3.7.5. When two accepted HTTPRoutes target the same backend Service and port but specify different backendRef filters, Traefik may resolve them to the same child service and apply one route's filter set to requests received through the other route. This can cause security-sensitive filter-derived context, including tenant identity, authorization context, or other backend-trusted headers, to be associated with the wrong route.
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An authorization/context-isolation flaw in Traefik's Kubernetes Gateway API provider. An attacker able to create an accepted HTTPRoute targeting a shared backend Service:port could cause its backendRef filter context, including security-sensitive trusted headers, to be applied to another route's requests, potentially enabling cross-namespace impact when a ReferenceGrant permits cross-namespace targeting.
A medium-severity access control and authorization vulnerability in Traefik's Kubernetes Gateway API provider that can cause backend context or security-sensitive header filters to leak across HTTPRoutes sharing the same backend Service:port.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.