CVE-2026-35563

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-35563
It was identified that the LDAP client implementation in version 2.1.7 does not verify if the server certificate matches the intended LDAP hostname. While the underlying code validates the certificate chain against a trusted authority, the absence of endpoint identification allows a valid certificate issued for an entirely unrelated host to be improperly accepted. This oversight leaves the connection highly vulnerable to server impersonation and complete connection compromise. The root cause of this vulnerability lies in the incomplete TLS server identity verification within the LDAP client implementation. The attacker requires MITM capability on the network to exploit this vulnerability. This attacker must be able to present a certificate trusted by the client's configured trust store. The hostname verification has been enforced in the new version of the LDAP API

8.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://lists.apache.org/thread/5rc2nzqxp1m9wknyf93r8dnp46fhc1nn Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/06/01/2 Mailing List Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:apache:directory_ldap_api:*:*:*:*:*:*:*:*
History

22 Jul 2026, 07:10

Type Values Removed Values Added
Summary
  • (es) Se identificó que la implementación del cliente LDAP en la versión 2.1.7 no verifica si el certificado del servidor coincide con el nombre de host LDAP previsto. Si bien el código subyacente valida la cadena de certificados contra una autoridad de confianza, la ausencia de identificación de punto final permite que un certificado válido emitido para un host completamente no relacionado sea aceptado incorrectamente. Esta omisión deja la conexión altamente vulnerable a la suplantación del servidor y al compromiso completo de la conexión. La causa raíz de esta vulnerabilidad reside en la verificación incompleta de la identidad del servidor TLS dentro de la implementación del cliente LDAP. El atacante requiere capacidad de MitM en la red para explotar esta vulnerabilidad. Este atacante debe poder presentar un certificado de confianza para el almacén de confianza configurado del cliente. La verificación del nombre de host se ha aplicado en la nueva versión de la API LDAP.

03 Jun 2026, 02:12

Type Values Removed Values Added
References () https://lists.apache.org/thread/5rc2nzqxp1m9wknyf93r8dnp46fhc1nn - () https://lists.apache.org/thread/5rc2nzqxp1m9wknyf93r8dnp46fhc1nn - Mailing List, Vendor Advisory
References () http://www.openwall.com/lists/oss-security/2026/06/01/2 - () http://www.openwall.com/lists/oss-security/2026/06/01/2 - Mailing List, Third Party Advisory
First Time Apache
Apache directory Ldap Api
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 8.5
CPE cpe:2.3:a:apache:directory_ldap_api:*:*:*:*:*:*:*:*

01 Jun 2026, 09:16

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2026/06/01/2 -

01 Jun 2026, 08:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-06-01 08:16

Updated : 2026-07-22 07:10

NVD link : CVE-2026-35563

Mitre link : CVE-2026-35563

CVE.ORG link : CVE-2026-35563

JSON object : View

Products Affected

apache

  • directory_ldap_api
CWE
CWE-297

Improper Validation of Certificate with Host Mismatch