https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Wed, 07 Oct 2026 00:12:21 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-368836 EUVD-2026-368836 https://cve.radiocsirt.org/vuln/euvd-2026-368836 https://cve.radiocsirt.org/vuln/fkie_cve-2026-55636 <p>Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.6, charts/capsule/templates/configuration.yaml configures the validating webhook with namespace/finalize instead of the Kubernetes resource name namespaces/finalize. A user with namespaces/finalize RBAC can send a PUT request to /api/v1/namespaces/{namespace}/finalize, and the singular rule never matches the plural resource, so the validating webhook is not invoked and the user can change the namespace tenant label. matchPolicy: Equivalent does not compensate because it handles API group and version equivalence rather than resource-name errors. This vulnerability is fixed in 0.13.6.</p> <p>Capsule is a multi-tenancy and policy-based framework for Kubernetes. From 0.13.0 until 0.13.6, charts/capsule/templates/configuration.yaml configures the validating webhook with namespace/finalize instead of the Kubernetes resource name namespaces/finalize. A user with namespaces/finalize RBAC can send a PUT request to /api/v1/namespaces/{namespace}/finalize, and the singular rule never matches the plural resource, so the validating webhook is not invoked and the user can change the namespace tenant label. matchPolicy: Equivalent does not compensate because it handles API group and version equivalence rather than resource-name errors. This vulnerability is fixed in 0.13.6.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2026-55636 https://cve.radiocsirt.org/vuln/ghsa-gwxr-7h77-7777 <p><strong>Affected:</strong> Go: github.com/projectcapsule/capsule</p> <p>### Summary Capsule v0.13.2 webhook rules contain `namespace/finalize` (singular) instead of `namespaces/finalize` (plural). K8s requires plural. The finalize defense from CVE-2026-30963 fix is absent.</p> <p>### Details PUT to `/api/v1/namespaces/&lt;ns&gt;/finalize` has resource=namespaces (plural). The singular rule never matches. `matchPolicy: Equivalent` does not compensate.</p> <p>### PoC Confirmed on kind + Capsule v0.13.2. alice (non-admin with namespaces/finalize RBAC): `kubectl label --as=alice` = DENIED (control). `kubectl replace --raw /finalize --as=alice` = 200 OK (bypass). Tenant label changed.</p> <p>### Impact Namespace tenant-label hijack. Same threat model as CVE-2026-30963. One-char fix: `namespace/finalize` -&gt; `namespaces/finalize`. The CVE-2026-30963 fix in Capsule v0.13.2 added subresource entries to the namespace validating webhook, but `charts/capsule/templates/configuration.yaml` line 105 contains a singular/plural typo: `namespace/finalize` instead of `namespaces/finalize`. Kubernetes webhook rules require the plural resource name. The finalize subresource defense is entirely absent.</p> <p>### Details In Kubernetes admission webhooks, `rules.resources` matches against the plural resource name. A PUT to `/api/v1/namespaces/&lt;ns&gt;/finalize` has `resource=namespaces` (plural). The rule `namespace/finalize` (singular) never matches any real API request.</p> <p>The `matchPolicy: Equivalent` setting does NOT compensate (it handles API group/version variations, not resource name typos).</p> <p>###…</p> <p><strong>Affected:</strong> Go: github.com/projectcapsule/capsule</p> <p>### Summary Capsule v0.13.2 webhook rules contain `namespace/finalize` (singular) instead of `namespaces/finalize` (plural). K8s requires plural. The finalize defense from CVE-2026-30963 fix is absent.</p> <p>### Details PUT to `/api/v1/namespaces/&lt;ns&gt;/finalize` has resource=namespaces (plural). The singular rule never matches. `matchPolicy: Equivalent` does not compensate.</p> <p>### PoC Confirmed on kind + Capsule v0.13.2. alice (non-admin with namespaces/finalize RBAC): `kubectl label --as=alice` = DENIED (control). `kubectl replace --raw /finalize --as=alice` = 200 OK (bypass). Tenant label changed.</p> <p>### Impact Namespace tenant-label hijack. Same threat model as CVE-2026-30963. One-char fix: `namespace/finalize` -&gt; `namespaces/finalize`. The CVE-2026-30963 fix in Capsule v0.13.2 added subresource entries to the namespace validating webhook, but `charts/capsule/templates/configuration.yaml` line 105 contains a singular/plural typo: `namespace/finalize` instead of `namespaces/finalize`. Kubernetes webhook rules require the plural resource name. The finalize subresource defense is entirely absent.</p> <p>### Details In Kubernetes admission webhooks, `rules.resources` matches against the plural resource name. A PUT to `/api/v1/namespaces/&lt;ns&gt;/finalize` has `resource=namespaces` (plural). The rule `namespace/finalize` (singular) never matches any real API request.</p> <p>The `matchPolicy: Equivalent` setting does NOT compensate (it handles API group/version variations, not resource name typos).</p> <p>###…</p> https://cve.radiocsirt.org/vuln/ghsa-gwxr-7h77-7777