{"id":"CVE-2026-63131","state":"PUBLISHED","title":"OpenBao LIST ACL bypass: a trailing-slash LIST request skips a more-specific deny rule (unported Vault v2.0.3 fix)","description":"OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, OpenBao's vault/policy/acl.go could evaluate a broader wildcard ACL grant before more-specific trailing-wildcard ACL paths with capabilities = [\"deny\"] for a LIST operation. When a parent path permitted LIST and a child path was denied, the trailing-slash lookup could therefore allow listing the denied path. Other operation types are outside the repository advisory's affected scope. This issue is fixed in version 2.6.0.","publishedAt":"2026-09-23T17:59:16.337Z","updatedAt":"2026-09-24T14:15:04.716Z","severity":{"score":6,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["openbao openbao"],"affected":[{"vendor":"openbao","product":"openbao","versions":[{"version":"< 2.6.0","status":"affected"}]}],"references":["https://github.com/openbao/openbao/security/advisories/GHSA-xp3c-3jw3-4vcr","https://github.com/openbao/openbao/pull/3389","https://github.com/openbao/openbao/pull/3474","https://github.com/openbao/openbao/commit/2e9625d6cebe4639d051ef53dd6ce7c49914ae6a","https://github.com/openbao/openbao/commit/f58d848c139e5ba71aa63103fcfe101972b999fc","https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#203","https://github.com/openbao/openbao/releases/tag/v2.6.0"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63131.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63131","state":"PUBLISHED","datePublished":"2026-09-23T17:59:16.337Z","dateUpdated":"2026-09-24T14:15:04.716Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-15T16:54:55.817Z"},"containers":{"cna":{"title":"OpenBao LIST ACL bypass: a trailing-slash LIST request skips a more-specific deny rule (unported Vault v2.0.3 fix)","descriptions":[{"lang":"en","value":"OpenBao is an open source identity-based secrets management system. Prior to 2.6.0, OpenBao's vault/policy/acl.go could evaluate a broader wildcard ACL grant before more-specific trailing-wildcard ACL paths with capabilities = [\"deny\"] for a LIST operation. When a parent path permitted LIST and a child path was denied, the trailing-slash lookup could therefore allow listing the denied path. Other operation types are outside the repository advisory's affected scope. This issue is fixed in version 2.6.0."}],"affected":[{"vendor":"openbao","product":"openbao","versions":[{"version":"< 2.6.0","status":"affected"}]}],"references":[{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-xp3c-3jw3-4vcr","name":"https://github.com/openbao/openbao/security/advisories/GHSA-xp3c-3jw3-4vcr","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/openbao/openbao/pull/3389","name":"https://github.com/openbao/openbao/pull/3389","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/pull/3474","name":"https://github.com/openbao/openbao/pull/3474","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/commit/2e9625d6cebe4639d051ef53dd6ce7c49914ae6a","name":"https://github.com/openbao/openbao/commit/2e9625d6cebe4639d051ef53dd6ce7c49914ae6a","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/commit/f58d848c139e5ba71aa63103fcfe101972b999fc","name":"https://github.com/openbao/openbao/commit/f58d848c139e5ba71aa63103fcfe101972b999fc","tags":["x_refsource_MISC"]},{"url":"https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#203","name":"https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#203","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/releases/tag/v2.6.0","name":"https://github.com/openbao/openbao/releases/tag/v2.6.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-23T17:59:16.337Z"},"source":{"advisory":"GHSA-xp3c-3jw3-4vcr","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-24T14:14:55.010515Z","id":"CVE-2026-63131","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-24T14:15:04.716Z"}}]}}}