CVE catalog
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 certificat
- Severity
- High · CVSS 8.8
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.18% · Oct 25, 2026
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
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | apache-directory-api | sid | 2.1.2-2 | vulnerable |
| Debian | apache-directory-api | forky | 2.1.2-2 | vulnerable |
| Debian | apache-directory-api | trixie | 2.1.2-2 | vulnerable |
| Debian | apache-directory-api | bookworm | 2.1.2-1 | vulnerable |
| Cpe | apache-directory-api | Not reported | Not reported | vulnerable |
| Cpe | directory_ldap_api | Not reported | 2.1.7 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | apache-directory-api | source | sid | (unfixed) | not yet assigned | Not reported | [1139171] |
| Debian | apache-directory-api | source | forky | (unfixed) | not yet assigned | Not reported | [1139171] |
| Debian | apache-directory-api | source | trixie | (unfixed) | not yet assigned | Not reported | [1139171] |
| Debian | apache-directory-api | source | bookworm | (unfixed) | not yet assigned | Not reported | [1139171] |
| Cpe | directory_ldap_api | cpe | Not reported | 2.1.7 | Not reported | Not reported | Not reported |
Notes
[trixie] apache-directory-api: Minor issue [bookworm] apache-directory-api: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libapache-directory-api-java]Affected
Source package: [apache-directory-api]
Details (2)
2.1.2-1· all · bookwormAffected
nvd · apache-directory-api · debian · bookworm; nvd · apache-directory-api · debian · 12
2.1.2-1· all · bookwormAffected
nvd · apache-directory-api · debian · bookworm; nvd · apache-directory-api · debian · 12
[Debian 13 (Trixie)]
- [libapache-directory-api-java]Affected
Source package: [apache-directory-api]
Details (2)
2.1.2-2· all · trixieAffected
nvd · apache-directory-api · debian · 13
2.1.2-2· all · trixieAffected
nvd · apache-directory-api · debian · 13
Observed: