{"id":"CVE-2026-63131","aliases":["BIT-openbao-2026-63131","GHSA-xp3c-3jw3-4vcr","GO-2026-6579"],"url":"https://o3.security/vulnerability/CVE-2026-63131","summary":"OpenBao LIST ACL bypass: a trailing-slash LIST request skips a more-specific deny rule (unported Vault v2.0.3 fix)","details":"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.","published":"2026-09-23T17:59:16.337Z","modified":"2026-10-21T02:58:55.130131100Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Go","name":"github.com/openbao/openbao","fixedVersion":"0.0.0-20260713133043-f58d848c139e"},{"ecosystem":"Go","name":"github.com/openbao/openbao","fixedVersion":null}],"fix":{"url":"https://github.com/openbao/openbao/commit/2e9625d6cebe4639d051ef53dd6ce7c49914ae6a","label":"openbao/openbao@2e9625d"},"references":[{"type":"WEB","url":"https://github.com/hashicorp/vault/blob/main/CHANGELOG.md#203"},{"type":"WEB","url":"https://github.com/openbao/openbao/releases/tag/v2.6.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63131.json"},{"type":"ADVISORY","url":"https://github.com/openbao/openbao/security/advisories/GHSA-xp3c-3jw3-4vcr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63131"},{"type":"FIX","url":"https://github.com/openbao/openbao/commit/2e9625d6cebe4639d051ef53dd6ce7c49914ae6a"},{"type":"FIX","url":"https://github.com/openbao/openbao/commit/f58d848c139e5ba71aa63103fcfe101972b999fc"},{"type":"FIX","url":"https://github.com/openbao/openbao/pull/3389"},{"type":"FIX","url":"https://github.com/openbao/openbao/pull/3474"},{"type":"PACKAGE","url":"https://github.com/openbao/openbao"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:58:55.130131100Z"}}