{"id":"CVE-2026-55770","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, OpenBao used EscapeLDAPValue, an RFC 4514 distinguished-name escaping function, where RFC 4515 LDAP search-filter escaping was required in sdk/helper/lda…","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-90"],"vendor":"openbao","product":"openbao","affected":["openbao < 2.5.5"],"patched":["github.com/openbao/openbao 0.0.0-20260617104213-10b7825c714c"],"published":"2026-09-15","updated":"2026-09-17","sourceUpdated":"2026-09-17T12:18:24.777","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55770","references":[{"url":"https://github.com/openbao/openbao/commit/10b7825c714c1ef25b6c3c1c2cd6ecd8747c0659","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/commit/8077f96bdc02137b0a072146b6f9ca11c96c549c","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/pull/3306","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/pull/3313","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-6mwx-4547-5vc9","label":"security-advisories@github.com"},{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-6mwx-4547-5vc9","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-6mwx-4547-5vc9"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-55770.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-55770"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55770"}],"tags":["nvd","cve.org","exploit-available","ghsa","go","csaf","vex","red-hat"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-16T03:56:33.833796Z"},"epss":0.00447,"epssPercentile":0.38161,"ecosystem":"go","scores":{"nvd":6.8,"vendor":7.4,"cna":6.8},"ingestedAt":"2026-06-22T13:35:24.289Z","slug":"CVE-2026-55770","body":"## Overview\n\nOpenBao is an open source identity-based secrets management system. Prior to 2.5.5, OpenBao used EscapeLDAPValue, an RFC 4514 distinguished-name escaping function, where RFC 4515 LDAP search-filter escaping was required in sdk/helper/ldaputil/client.go GetUserDN. With the LDAP authentication backend configured for an Active Directory UPNDomain path or UserDN and UserAttr binding, an attacker-controlled username containing filter metacharacters could alter the search predicate and select a different directory entry because EscapeLDAPValue does not neutralize the characters handled by ldap.EscapeFilter. A resulting token could be associated with another LDAP identity and gain access to secrets, policies, or modification capabilities assigned to that identity. 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-2026-55770)\n\nAffected packages:\n\n- `github.com/openbao/openbao >= 0.1.0, <= 2.5.4`\n- `github.com/openbao/openbao < 0.0.0-20260617104213-10b7825c714c`\n\nPatched in:\n\n- `github.com/openbao/openbao 0.0.0-20260617104213-10b7825c714c`\n\nSource: https://github.com/advisories/GHSA-6mwx-4547-5vc9\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-2026-55770.json)","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":37.4,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":204752,"id":"CVE-2026-55770","ts":1789534221058,"field":"exploit_available","old":"false","new":"true"}]}