DEBIAN-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 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
DEBIAN-CVE-2026-35563
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-35563
apache-directory-api
Source reference: /affected/0/package/name
- Affected versions
- 2.1.2-1
Source reference:
/affected/0/versions2.1.2-2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
apache-directory-api
Source reference: /affected/1/package/name
- Affected versions
- 2.1.2-2
Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
apache-directory-api
Source reference: /affected/2/package/name
- Affected versions
- 2.1.2-2
Source reference:
/affected/2/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "apache-directory-api",
"purl": "pkg:deb/debian/apache-directory-api?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.1.2-1",
"2.1.2-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35563.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "apache-directory-api",
"purl": "pkg:deb/debian/apache-directory-api?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.1.2-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35563.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "apache-directory-api",
"purl": "pkg:deb/debian/apache-directory-api?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.1.2-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35563.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56416 · Revision 1
- Added to Heist Feed
- Publisher date