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2 vulnerabilities found for Apache Directory LDAP API by Apache Software Foundation

CVE-2026-35563 (GCVE-0-2026-35563)

Vulnerability from nvd – Published: 2026-06-01 07:12 – Updated: 2026-06-01 13:09
VLAI
Title
Apache Directory LDAP API: LDAP client implementation does not verify if the server certificate matches the intended LDAP hostname
Summary
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
Severity
8.8 (High)
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
CWE
  • CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
Impacted products
Credits
Rafał Łykowski and Łukasz Kollbek of Qualtrics
Show details on NVD website
To clipboard 

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CVE-2026-35563 (GCVE-0-2026-35563)

Vulnerability from cvelistv5 – Published: 2026-06-01 07:12 – Updated: 2026-06-01 13:09
VLAI
Title
Apache Directory LDAP API: LDAP client implementation does not verify if the server certificate matches the intended LDAP hostname
Summary
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
Severity
8.8 (High)
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
CWE
  • CWE-297 - Improper Validation of Certificate with Host Mismatch
Assigner
References
Impacted products
Credits
Rafał Łykowski and Łukasz Kollbek of Qualtrics
Show details on NVD website
To clipboard 

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