{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.5.5"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "10b7825c714c1ef25b6c3c1c2cd6ecd8747c0659"
            },
            {
              "fixed": "8077f96bdc02137b0a072146b6f9ca11c96c549c"
            },
            {
              "fixed": "028992583c693c4de6350b8aa52ff85e30375a99"
            },
            {
              "fixed": "03e3a243b6f07d17c60ce0a182adee7cf4c424eb"
            }
          ],
          "repo": "https://github.com/openbao/openbao",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-6mwx-4547-5vc9"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-90"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55770.json"
  },
  "details": "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.",
  "id": "CVE-2026-55770",
  "modified": "2026-09-19T03:30:47.464111147Z",
  "published": "2026-09-15T15:44:35.898Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/releases/tag/v2.5.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openbao/openbao/releases/tag/v2.6.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55770.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/openbao/openbao/security/advisories/GHSA-6mwx-4547-5vc9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55770"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openbao/openbao/commit/10b7825c714c1ef25b6c3c1c2cd6ecd8747c0659"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openbao/openbao/commit/8077f96bdc02137b0a072146b6f9ca11c96c549c"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openbao/openbao/pull/3306"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openbao/openbao/pull/3313"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenBao: LDAPi ldaputil (wrong escape func)"
}