github.com
https://github.com/OpenIdentityPlatform/OpenDJ CVE-2026-73644
CRITICAL
OpenDJ: Authorization bypass in SASL PLAIN allowing a `proxied-auth` holder to impersonate any resolvable non-root user without an ACI proxy grant
Record summary
CVE-2026-73644 has a selected CVSS score of 9.6 (critical).
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.
Description source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
| CVE List | < 5.1.2 | affected | |
org.openidentityplatform.opendj:opendj-server-legacyBrowse Maven / org.openidentityplatform.opendj:opendj-server-legacy | GitHub Advisory | Before 5.1.2 · Fixed in 5.1.2 | affected |
References
4github.com
https://github.com/OpenIdentityPlatform/OpenDJ/commit/5c326850f1ab945cfca7ac9c5aaf77d1052c6bed github.com
https://github.com/OpenIdentityPlatform/OpenDJ/releases/tag/5.1.2 github.comConfirmation
https://github.com/OpenIdentityPlatform/OpenDJ/security/advisories/GHSA-p279-2cqp-84jg