CVE-2026-55776

{"id": "CVE-2026-55776", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55776", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-17T15:33:37.116627Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "openbao", "product": "openbao", "versions": [{"status": "affected", "version": "< 2.5.5"}]}]}], "published": "2026-09-15T16:17:16.220", "references": [{"url": "https://github.com/openbao/openbao/commit/bb17827f3e33779a10166f7d0e61b191c0facef9", "source": "security-advisories@github.com"}, {"url": "https://github.com/openbao/openbao/commit/db57c62602b25da12951f3f0edb888e7c4da61e5", "source": "security-advisories@github.com"}, {"url": "https://github.com/openbao/openbao/pull/3309", "source": "security-advisories@github.com"}, {"url": "https://github.com/openbao/openbao/pull/3312", "source": "security-advisories@github.com"}, {"url": "https://github.com/openbao/openbao/releases/tag/v2.5.5", "source": "security-advisories@github.com"}, {"url": "https://github.com/openbao/openbao/releases/tag/v2.6.0", "source": "security-advisories@github.com"}, {"url": "https://github.com/openbao/openbao/security/advisories/GHSA-8w8f-r2xv-4q4j", "source": "security-advisories@github.com"}, {"url": "https://github.com/openbao/openbao/security/advisories/GHSA-8w8f-r2xv-4q4j", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-617"}]}], "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."}], "lastModified": "2026-09-29T19:06:32.333", "sourceIdentifier": "security-advisories@github.com"}