Vulnerability Description
OpenDJ is an LDAPv3 compliant directory service. Prior to 5.1.2, the SASL PLAIN authorization identity path in opendj-server-legacy/src/main/java/org/opends/server/extensions/PlainSASLMechanismHandler.java checked the PROXIED_AUTH privilege but did not evaluate the mayProxy proxy ACI scope when an authzid resolved to a different user. Both dn: and u: or bare authzid forms could therefore let an authenticated account holding PROXIED_AUTH assume any resolvable non-root identity outside the identities permitted by its proxy ACI. The fix returns INVALID_CREDENTIALS (49) before password verification when the target authorization identity is not permitted. This issue is fixed in version 5.1.2.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/OpenIdentityPlatform/OpenDJ/commit/5c326850f1ab945cfca7ac9c5a
- https://github.com/OpenIdentityPlatform/OpenDJ/releases/tag/5.1.2
- https://github.com/OpenIdentityPlatform/OpenDJ/security/advisories/GHSA-p279-2cq
FAQ
What is CVE-2026-73644?
CVE-2026-73644 is a vulnerability with a CVSS score of 9.6 (CRITICAL). OpenDJ is an LDAPv3 compliant directory service. Prior to 5.1.2, the SASL PLAIN authorization identity path in opendj-server-legacy/src/main/java/org/opends/server/extensions/PlainSASLMechanismHandler...
How severe is CVE-2026-73644?
CVE-2026-73644 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-73644?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.