{"id":"CVE-2026-55770","state":"PUBLISHED","title":"OpenBao: LDAPi ldaputil (wrong escape func)","description":"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/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.","publishedAt":"2026-09-15T15:44:35.898Z","updatedAt":"2026-09-17T11:59:03.495Z","severity":{"score":6.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","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-6mwx-4547-5vc9","https://github.com/openbao/openbao/pull/3306","https://github.com/openbao/openbao/pull/3313","https://github.com/openbao/openbao/commit/10b7825c714c1ef25b6c3c1c2cd6ecd8747c0659","https://github.com/openbao/openbao/commit/8077f96bdc02137b0a072146b6f9ca11c96c549c","https://github.com/openbao/openbao/releases/tag/v2.5.5","https://github.com/openbao/openbao/releases/tag/v2.6.0"],"weaknesses":["CWE-90"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55770.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55770","state":"PUBLISHED","datePublished":"2026-09-15T15:44:35.898Z","dateUpdated":"2026-09-17T11:59:03.495Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-17T14:34:51.881Z"},"containers":{"cna":{"title":"OpenBao: LDAPi ldaputil (wrong escape func)","descriptions":[{"lang":"en","value":"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/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."}],"affected":[{"vendor":"openbao","product":"openbao","versions":[{"version":"< 2.5.5","status":"affected"}]}],"references":[{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-6mwx-4547-5vc9","name":"https://github.com/openbao/openbao/security/advisories/GHSA-6mwx-4547-5vc9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/openbao/openbao/pull/3306","name":"https://github.com/openbao/openbao/pull/3306","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/pull/3313","name":"https://github.com/openbao/openbao/pull/3313","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/commit/10b7825c714c1ef25b6c3c1c2cd6ecd8747c0659","name":"https://github.com/openbao/openbao/commit/10b7825c714c1ef25b6c3c1c2cd6ecd8747c0659","tags":["x_refsource_MISC"]},{"url":"https://github.com/openbao/openbao/commit/8077f96bdc02137b0a072146b6f9ca11c96c549c","name":"https://github.com/openbao/openbao/commit/8077f96bdc02137b0a072146b6f9ca11c96c549c","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":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-90","lang":"en","description":"CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-15T15:44:35.898Z"},"source":{"advisory":"GHSA-6mwx-4547-5vc9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/openbao/openbao/security/advisories/GHSA-6mwx-4547-5vc9","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-16T03:56:33.833796Z","id":"CVE-2026-55770","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-17T11:59:03.495Z"}}]}}}