Vulnerability from bitnami_vulndb
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": [
{
"package": {
"ecosystem": "Bitnami",
"name": "openbao",
"purl": "pkg:bitnami/openbao"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.5.5"
}
],
"type": "SEMVER"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
],
"aliases": [
"CVE-2026-55770"
],
"database_specific": {
"cpes": [
"cpe:2.3:a:openbao:openbao:*:*:*:*:*:go:*:*"
],
"severity": "Medium"
},
"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": "BIT-openbao-2026-55770",
"modified": "2026-09-25T12:52:12.177Z",
"published": "2026-09-25T12:28:08.577Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/openbao/openbao/commit/10b7825c714c1ef25b6c3c1c2cd6ecd8747c0659"
},
{
"type": "WEB",
"url": "https://github.com/openbao/openbao/commit/8077f96bdc02137b0a072146b6f9ca11c96c549c"
},
{
"type": "WEB",
"url": "https://github.com/openbao/openbao/pull/3306"
},
{
"type": "WEB",
"url": "https://github.com/openbao/openbao/pull/3313"
},
{
"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": "WEB",
"url": "https://github.com/openbao/openbao/security/advisories/GHSA-6mwx-4547-5vc9"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55770"
}
],
"schema_version": "1.6.2",
"summary": "OpenBao: LDAPi ldaputil (wrong escape func)"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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