CVE-2026-35563

8.5 HIGH
Published: June 01, 2026 Modified: June 03, 2026
View on NVD

Description

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

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://lists.apache.org/thread/5rc2nzqxp1m9wknyf93r8dnp46fhc1nn
Source: security@apache.org
Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/06/01/2
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory

2 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.5 / 10.0
EPSS (Exploit Probability)
0.2%
8th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

apache