{"id":"CVE-2026-55776","title":"OpenBao is an open source identity-based secrets management system","summary":"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 paramete…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-617"],"vendor":"openbao","product":"openbao","affected":["openbao < 2.5.5"],"patched":["github.com/openbao/openbao 0.0.0-20260617104123-db57c62602b2"],"published":"2026-09-15","updated":"2026-09-17","sourceUpdated":"2026-09-17T16:17:31.283","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55776","references":[{"url":"https://github.com/openbao/openbao/commit/bb17827f3e33779a10166f7d0e61b191c0facef9","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/commit/db57c62602b25da12951f3f0edb888e7c4da61e5","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/pull/3309","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/pull/3312","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/releases/tag/v2.5.5","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/releases/tag/v2.6.0","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-8w8f-r2xv-4q4j","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-8w8f-r2xv-4q4j","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-8w8f-r2xv-4q4j"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55776.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-55776"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55776"}],"tags":["nvd","cve.org","exploit-available","ghsa","go","csaf","vex","red-hat"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-17T15:33:37.116627Z"},"epss":0.00455,"epssPercentile":0.38697,"ecosystem":"go","ingestedAt":"2026-06-22T13:35:24.281Z","slug":"CVE-2026-55776","body":"## Overview\n\nOpenBao 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-55776)\n\nAffected packages:\n\n- `github.com/openbao/openbao >= 0.1.0, <= 2.5.4`\n- `github.com/openbao/openbao < 0.0.0-20260617104123-db57c62602b2`\n\nPatched in:\n\n- `github.com/openbao/openbao 0.0.0-20260617104123-db57c62602b2`\n\nSource: https://github.com/advisories/GHSA-8w8f-r2xv-4q4j\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55776.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":206248,"id":"CVE-2026-55776","ts":1789662143425,"field":"exploit_available","old":"false","new":"true"}]}