CVE-2026-65601

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{"bugzilla": {"description": "github.com/traefik/traefik/v3: traefik: Traefik: Privilege Escalation via Kubernetes Gateway API Namespace Confusion", "id": "2506094", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506094"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-348", "details": ["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.", "A flaw was found in Traefik, a cloud-native edge router. A low-privileged user in a Kubernetes environment could exploit a namespace confusion vulnerability within the Kubernetes Gateway API provider. This flaw allows an attacker to bypass security controls by incorrectly binding a Traefik Middleware from a different namespace, potentially leading to the injection of trusted identity headers into network requests. This could result in unauthorized access or privilege escalation within the Kubernetes cluster."], "name": "CVE-2026-65601", "package_state": [{"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Affected", "package_name": "devspaces/traefik-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}], "public_date": "2026-07-22T11:21:47Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-65601\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-65601\nhttps://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0\nhttps://github.com/traefik/traefik/security/advisories/GHSA-qq9q-x9w4-chhj\nhttps://www.vulncheck.com/advisories/traefik-before-namespace-confusion-via-httproute-extensionref"], "statement": "This is an Important flaw in Traefik's Kubernetes Gateway API provider, affecting Red Hat OpenShift Dev Spaces. A low-privileged user in a Kubernetes environment can exploit a namespace confusion vulnerability to bypass security controls. This allows for the incorrect binding of a Traefik Middleware from a different namespace, potentially leading to the injection of trusted identity headers and subsequent privilege escalation within the cluster.", "threat_severity": "Important"}

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