{"cve":"CVE-2026-55770","nvd":{"published":"2026-09-15T16:17:15.763","modified":"2026-09-29T19:06:32.333","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N","score":6.8},"cwes":["CWE-90"],"references":["https://github.com/openbao/openbao/commit/10b7825c714c1ef25b6c3c1c2cd6ecd8747c0659","https://github.com/openbao/openbao/commit/8077f96bdc02137b0a072146b6f9ca11c96c549c","https://github.com/openbao/openbao/pull/3306","https://github.com/openbao/openbao/pull/3313","https://github.com/openbao/openbao/releases/tag/v2.5.5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-55770","score":0.00525,"percentile":0.44555,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-6mwx-4547-5vc9","url":"https://osv.dev/vulnerability/GHSA-6mwx-4547-5vc9","summary":"OpenBao: LDAPi ldaputil (wrong escape func)","modified":"2026-09-25T14:25:54.748421990Z","packages":[{"ecosystem":"Go","name":"github.com/openbao/openbao","purl":"pkg:golang/github.com/openbao/openbao","ranges":[">=0.1.0 <=2.5.4"],"fixed":[]},{"ecosystem":"Go","name":"github.com/openbao/openbao","purl":"pkg:golang/github.com/openbao/openbao","ranges":["<0.0.0-20260617104213-10b7825c714c"],"fixed":["0.0.0-20260617104213-10b7825c714c"]}]},{"id":"GO-2026-5182","url":"https://osv.dev/vulnerability/GO-2026-5182","summary":"OpenBao: LDAPi ldaputil (wrong escape func) in github.com/openbao/openbao","modified":"2026-09-25T14:25:54.748421990Z","packages":[{"ecosystem":"Go","name":"github.com/openbao/openbao","purl":"pkg:golang/github.com/openbao/openbao","ranges":["<0.0.0-20260617104213-10b7825c714c",">=0.1.0"],"fixed":["0.0.0-20260617104213-10b7825c714c"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}