{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55636","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-16T23:52:12.057Z","datePublished":"2026-09-15T15:27:44.731Z","dateUpdated":"2026-09-15T18:02:29.068Z"},"containers":{"cna":{"title":"Capsule: Incomplete fix of CVE-2026-30963: singular/plural typo leaves namespaces/finalize unprotected","problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.7,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:H/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/projectcapsule/capsule/security/advisories/GHSA-gwxr-7h77-7777","tags":["x_refsource_CONFIRM"],"url":"https://github.com/projectcapsule/capsule/security/advisories/GHSA-gwxr-7h77-7777"},{"name":"https://github.com/projectcapsule/capsule/pull/1966","tags":["x_refsource_MISC"],"url":"https://github.com/projectcapsule/capsule/pull/1966"},{"name":"https://github.com/projectcapsule/capsule/commit/af2f37793e789b2301da8ed8dfb52ab60affebb6","tags":["x_refsource_MISC"],"url":"https://github.com/projectcapsule/capsule/commit/af2f37793e789b2301da8ed8dfb52ab60affebb6"},{"name":"https://github.com/projectcapsule/capsule/releases/tag/v0.13.6","tags":["x_refsource_MISC"],"url":"https://github.com/projectcapsule/capsule/releases/tag/v0.13.6"}],"affected":[{"vendor":"projectcapsule","product":"capsule","versions":[{"version":">= 0.13.0, < 0.13.6","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-15T15:27:44.731Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-gwxr-7h77-7777","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-15T17:38:16.677370Z","id":"CVE-2026-55636","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-15T18:02:29.068Z"}}]}}