> CVE-2026-55770 [MEDIUM]

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PUBLISHED
2026-09-15 16:17
MODIFIED
2026-09-15 16:17
CVSS_SCORE V3
6.8
EPSS (Prob. Exploit)
0.53%
Top 56.2%
DATA SOURCES:
NVD 🔗 2026-09-15 CWE MITRE 🔗 2026-10-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-09-22 OSV 🔗 2026-09-22

> 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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
EXPLOITABILITY
1.6
IMPACT
5.2

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
High (H)
Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis)
Privileges Required
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-90

> CWE DETAILED DESCRIPTIONS

CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') - The product constructs all or part of an LDAP query using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended LDAP query when it is sent to a downstream component.

> GITHUB SECURITY ADVISORY

GHSA-6mwx-4547-5vc9 MODERATE

OpenBao: LDAPi ldaputil (wrong escape func)

AFFECTED PACKAGES:
GO / github.com/openbao/openbao
< 0.0.0-20260617104213-10b7825c714c
Fixed in: 0.0.0-20260617104213-10b7825c714c
GO / github.com/openbao/openbao
>= 0.1.0, <= 2.5.4

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

OpenBao: LDAPi ldaputil (wrong escape func)

AFFECTED PACKAGES:
Unknown / Unknown
143 versions affected
ALIASES:
GHSA-6mwx-4547-5vc9, GO-2026-5182

> HISTORIQUE DES MODIFICATIONS

Première apparition
15/09/2026 16:17
Source: NVD
📊 ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') - The product constructs all or part of an LDAP query using externally-influenced input from an upstream co...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/openbao/openbao/commit/10b7825c714c1ef25b6c3c1c2cd6ecd8747c06...
https://github.com/openbao/openbao/commit/8077f96bdc02137b0a072146b6f9ca11c96c54...
https://github.com/openbao/openbao/pull/3306
https://github.com/openbao/openbao/pull/3313
https://github.com/openbao/openbao/releases/tag/v2.5.5
https://github.com/openbao/openbao/releases/tag/v2.6.0
https://github.com/openbao/openbao/security/advisories/GHSA-6mwx-4547-5vc9
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