CVE Catalog

CVE-2026-35563

HighCVSS 8.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.18%

8th percentile - higher than 8% of all known CVEs

Summary

The LDAP client implementation in version 2.1.7 does not verify if the server certificate matches the intended LDAP hostname. Despite certificate chain validation, the absence of endpoint identification allows a valid certificate issued for an entirely unrelated host to be improperly accepted. An attacker with MITM capability on the network can impersonate the LDAP server.

Risk Assessment

An attacker with network access can intercept and modify LDAP traffic, leading to credential theft or data confidentiality breaches.

Recommendation

Update the LDAP library to a version that enforces hostname verification.

Related vulnerabilities

Original NVD description (English source)

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

Vulnerability data from NVD (NIST) · CISA KEV · EPSS