8.8

CVE-2026-35563

Apache Directory LDAP API: LDAP client implementation does not verify if the server certificate matches the intended LDAP hostname

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
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Apache ≫ Directory Ldap Api Version >= 2.0.0 < 2.1.7
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.078
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 8.5 1.8 6
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
security@apache.org 8.8 0 0
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-297 Improper Validation of Certificate with Host Mismatch

The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host.

https://lists.apache.org/thread/5rc2nzqxp1m9wknyf93r8dnp46fhc1nn
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http://www.openwall.com/lists/oss-security/2026/06/01/2
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