Log in Start free

Vulnerability · Published Sep 7, 2026 · Assigned by redhat

CVE-2026-18922389-ds-base: 389-ds-base: sasl plain authentication allows privilege escalation to directory manager via stale identity in cyrus sasl auxiliary property

Critical 9.8

In plain English

A critical-severity improper authentication in Red Hat Directory Server 11.5 E4S for RHEL 8 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 53.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10389-ds-base3.2.0-10.el10_2ALSA-2026:64785
AlmaLinux:8389-ds-base1.4.3.39-28.module_el8.10.0+4274+00f9a3f1ALSA-2026:64791
AlmaLinux:9389-ds-base2.8.0-10.el9_8ALSA-2026:64784
AlmaLinux:10389-ds-base-bdb3.2.0-10.el10_2ALSA-2026:64785
AlmaLinux:10389-ds-base-devel3.2.0-10.el10_2ALSA-2026:64785
AlmaLinux:8389-ds-base-devel1.4.3.39-28.module_el8.10.0+4274+00f9a3f1ALSA-2026:64791
AlmaLinux:9389-ds-base-devel2.8.0-10.el9_8ALSA-2026:64784
AlmaLinux:8389-ds-base-legacy-tools1.4.3.39-28.module_el8.10.0+4274+00f9a3f1ALSA-2026:64791
AlmaLinux:10389-ds-base-libs3.2.0-10.el10_2ALSA-2026:64785
AlmaLinux:8389-ds-base-libs1.4.3.39-28.module_el8.10.0+4274+00f9a3f1ALSA-2026:64791
AlmaLinux:9389-ds-base-libs2.8.0-10.el9_8ALSA-2026:64784
AlmaLinux:10389-ds-base-snmp3.2.0-10.el10_2ALSA-2026:64785
AlmaLinux:8389-ds-base-snmp1.4.3.39-28.module_el8.10.0+4274+00f9a3f1ALSA-2026:64791
AlmaLinux:9389-ds-base-snmp2.8.0-10.el9_8ALSA-2026:64784
AlmaLinux:10python3-lib3893.2.0-10.el10_2ALSA-2026:64785
AlmaLinux:8python3-lib3891.4.3.39-28.module_el8.10.0+4274+00f9a3f1ALSA-2026:64791
AlmaLinux:9python3-lib3892.8.0-10.el9_8ALSA-2026:64784
Debian:12389-ds-baseno fix listedDEBIAN-CVE-2026-18922
Debian:13389-ds-baseno fix listedDEBIAN-CVE-2026-18922
Rocky Linux:10389-ds-base0:3.2.0-10.el10_2RLSA-2026:64785
Rocky Linux:8389-ds-base0:1.4.3.39-28.module+el8.10.0+40311+cd962df1RLSA-2026:64791
Rocky Linux:9389-ds-base0:2.8.0-10.el9_8RLSA-2026:64784
Ubuntu:22.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-18922
Ubuntu:24.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-18922
Ubuntu:26.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-18922
Ubuntu:26.10389-ds-baseno fix listedUBUNTU-CVE-2026-18922

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8 see references
Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8 see references
Red Hat Red Hat Directory Server 11.9 for RHEL 8 see references
Red Hat Red Hat Directory Server 12.2 E4S for RHEL 9 see references
Red Hat Red Hat Directory Server 12.4 E4S for RHEL 9 see references
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat Directory Server 12 see references
Red Hat Red Hat Directory Server 13 see references

Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References