Attack Chain

1. Attacker identifies an Apache CXF server with an exposed XKMS service using the LDAP Certificate repository.
2. The attacker crafts a malicious LDAP query string containing injection payloads.
3. The attacker sends a request to the vulnerable XKMS endpoint, embedding the malicious LDAP query.
4. The Apache CXF server processes the request and constructs an LDAP query using the attacker-supplied input without proper sanitization.
5. The crafted LDAP query is executed against the LDAP server.
6. Due to the LDAP injection vulnerability, the attacker is able to bypass intended access controls.
7. The attacker retrieves sensitive certificate data from the LDAP server that they are not authorized to access.

Impact

Successful exploitation of CVE-2026-44930 can lead to the unauthorized disclosure of sensitive information, specifically the arbitrary certificates stored within the LDAP repository. The impact of this vulnerability is significant as compromised certificates can be used for identity spoofing, man-in-the-middle attacks, and other malicious activities. Organizations utilizing affected versions of Apache CXF are at risk of having their certificate data exposed.

Recommendation

• Upgrade to Apache CXF versions 4.2.1, 4.1.6, or 3.6.11 to remediate the LDAP injection vulnerability as advised in the advisory (https://lists.apache.org/thread/c1zqxppo1m5z3kbdhjn5p991zk09ynkh).
• Deploy the Sigma rule “Detects CVE-2026-44930 Exploitation — Malicious LDAP Query” to identify potential exploitation attempts.
• Monitor web server logs for unusual LDAP-related requests targeting the XKMS service.