{"id":"CVE-2026-55776","state":"PUBLISHED","title":"OpenBao: Transit secrets engine crashes on key creation with `derived: true` for asymmetric key types","description":"OpenBao is an open source identity-based secrets management system. Prior to 2.5.5, an authenticated OpenBao caller with write access to transit/keys/* could terminate the server process by setting derived to true while the type parameter selected rsa-, ecdsa-, or ed25519. The Transit policy creation path in builtin/logical/transit/backend.go and sdk/helper/keysutil/policy.go could reach an error path that double-unlocked a mutex while handling this invalid asymmetric derived-key combination, causing a panic, no HTTP response, process exit, and denial of service. JSON and HCL key-creation requests can express the triggering combination. This issue is fixed in version 2.5.5.","publishedAt":"2026-09-15T15:43:29.564Z","updatedAt":"2026-09-17T15:35:58.867Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["openbao openbao"],"affected":[{"vendor":"openbao","product":"openbao","versions":[{"version":"< 2.5.5","status":"affected"}]}],"references":["https://github.com/openbao/openbao/security/advisories/GHSA-8w8f-r2xv-4q4j","https://github.com/openbao/openbao/pull/3309","https://github.com/openbao/openbao/pull/3312","https://github.com/openbao/openbao/commit/bb17827f3e33779a10166f7d0e61b191c0facef9","https://github.com/openbao/openbao/commit/db57c62602b25da12951f3f0edb888e7c4da61e5","https://github.com/openbao/openbao/releases/tag/v2.5.5","https://github.com/openbao/openbao/releases/tag/v2.6.0"],"weaknesses":["CWE-617"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55776.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55776","state":"PUBLISHED","datePublished":"2026-09-15T15:43:29.564Z","dateUpdated":"2026-09-17T15:35:58.867Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-17T14:40:28.379Z"},"containers":{"cna":{"title":"OpenBao: Transit secrets engine crashes on key creation with `derived: true` for asymmetric key types","descriptions":[{"lang":"en","value":"OpenBao is an open source identity-based secrets management system. Prior to 2.5.5, an authenticated OpenBao caller with write access to transit/keys/* could terminate the server process by setting derived to true while the type parameter selected rsa-, ecdsa-, or ed25519. The Transit policy creation path in builtin/logical/transit/backend.go and sdk/helper/keysutil/policy.go could reach an error path that double-unlocked a mutex while handling this invalid asymmetric derived-key combination, causing a panic, no HTTP response, process exit, and denial of service. JSON and HCL key-creation requests can express the triggering combination. This issue is fixed in version 2.5.5."}],"affected":[{"vendor":"openbao","product":"openbao","versions":[{"version":"< 2.5.5","status":"affected"}]}],"references":[{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-8w8f-r2xv-4q4j","name":"https://github.com/openbao/openbao/security/advisories/GHSA-8w8f-r2xv-4q4j","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/openbao/openbao/pull/3309","name":"https://github.com/openbao/openbao/pull/3309","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/pull/3312","name":"https://github.com/openbao/openbao/pull/3312","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/commit/bb17827f3e33779a10166f7d0e61b191c0facef9","name":"https://github.com/openbao/openbao/commit/bb17827f3e33779a10166f7d0e61b191c0facef9","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/commit/db57c62602b25da12951f3f0edb888e7c4da61e5","name":"https://github.com/openbao/openbao/commit/db57c62602b25da12951f3f0edb888e7c4da61e5","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/releases/tag/v2.5.5","name":"https://github.com/openbao/openbao/releases/tag/v2.5.5","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":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-617","lang":"en","description":"CWE-617: Reachable Assertion","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-15T15:43:29.564Z"},"source":{"advisory":"GHSA-8w8f-r2xv-4q4j","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-8w8f-r2xv-4q4j","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-17T15:33:37.116627Z","id":"CVE-2026-55776","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-17T15:35:58.867Z"}}]}}}