Vulnerability Intelligence Report
389-ds-base: 389-ds-base: sasl plain authentication allows privilege escalation to directory manager via stale identity in cyrus sasl auxiliary property
CVE-2026-18922
A flaw was found in 389 Directory Server. During SASL PLAIN authentication, a stale identity carried in a Cyrus SASL auxiliary property from a prior failed bind attempt can be installed on a connection following a subsequent, unrelated successful bind, regardless of which SASL mechanism completes that second bind. An attacker can send a SASL PLAIN bind as cn=Directory Manager with an incorrect password, then complete a SASL ANONYMOUS bind on the same connection, causing the server to grant Directory Manager authority without any valid credentials. A variant using a valid low-privileged account's own successful bind instead of an anonymous one is also possible.
Authentication Bypass
No Active Exploit Signals
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:0.56%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-287 ↗Improper Authentication
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Red Hat | Red Hat Directory Server 11.7 E4S for RHEL 8 | 8080020260903102346.f969626e < * (unaffected) |
| Red Hat | Red Hat Directory Server 11.9 for RHEL 8 | 8100020260904171440.37ed7c03 < * (unaffected) |
| Red Hat | Red Hat Directory Server 12.2 E4S for RHEL 9 | 9020020260903155914.1674d574 < * (unaffected) |
| Red Hat | Red Hat Directory Server 12.4 E4S for RHEL 9 | 9040020260903102623.1674d574 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.2.0-10.el10_2 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:3.0.6-21.el10_0 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION | 0:1.2.11.15-97.el6_10.1 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | 0:1.3.11.1-15.el7_9 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8 | 8100020260904155442.25e700aa < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 8040020260901171549.96015a92 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | 8040020260901171549.96015a92 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 8060020260901145727.824efc52 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 8060020260901145727.824efc52 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 8080020260831180218.6dbb3803 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 8080020260831180218.6dbb3803 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.8.0-10.el9_8 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:2.2.4-22.el9_2 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | 0:2.4.5-29.el9_4 < * (unaffected) |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:2.6.1-24.el9_6 < * (unaffected) |
| Red Hat | Red Hat Directory Server 12 | all |
| Red Hat | Red Hat Directory Server 13 | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Red Hat, Inc. · Vendor · USA |
| Reserved | 2026-08-05T08:26:17 |
| Published | 2026-09-07T14:14:53 |
| Patch Date | 2026-09-07 |
| Last Updated | 2026-09-08T13:04:34 |
Community Chatter & Buzz