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CVE-2026-18922— 389-ds-base: 389-ds-base: sasl plain authentication allows privilege escalation to directory manager via stale identity in cyrus sasl auxiliary property

Quick assessment

Affected
Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 389 Directory Server 中发现了一个漏洞。 在 SASL PLAIN 认证过程中，来自之前一次失败绑定尝试的过期身份标识，会通过 Cyrus SASL 辅助属性保留在连接中，并可能在随后一次不相关的成功绑定中生效，无论该次绑定是通过哪种 SASL 机制完成的。 攻击者可以发送一个使用 账户但密码错误的 SASL PLAIN 绑定，然后在同一连接上完成一个 SASL ANONYMOUS 绑定，从而使得服务器在没有任何有效凭据的情况下，仍会授予 Directory Manager 权限。此外，还可

CVSS 9.8 · Critical

Affected Version Matrix 8

VendorProduct Version RangeStatus
Red Hat Red Hat Directory Server 11 any affected
Red Hat Red Hat Directory Server 12 any affected
Red Hat Red Hat Directory Server 13 any unaffected
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any affected
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
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I. Basic Information for CVE-2026-18922

Vulnerability Information
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Vulnerability Title
389-ds-base: 389-ds-base: sasl plain authentication allows privilege escalation to directory manager via stale identity in cyrus sasl auxiliary property
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8 8080020260903102346.f969626e ~ * cpe:/a:redhat:directory_server_e4s:11.7::el8
Red Hat Red Hat Directory Server 11.9 for RHEL 8 8100020260904171440.37ed7c03 ~ * cpe:/a:redhat:directory_server:11.9::el8
Red Hat Red Hat Directory Server 12.2 E4S for RHEL 9 9020020260903155914.1674d574 ~ * cpe:/a:redhat:directory_server_e4s:12.2::el9
Red Hat Red Hat Directory Server 12.4 E4S for RHEL 9 9040020260903102623.1674d574 ~ * cpe:/a:redhat:directory_server_e4s:12.4::el9
Red Hat Red Hat Enterprise Linux 10 0:3.2.0-10.el10_2 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.0.6-21.el10_0 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION 0:1.2.11.15-97.el6_10.1 ~ * cpe:/o:redhat:rhel_els:6
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.3.11.1-15.el7_9 ~ * cpe:/o:redhat:rhel_els:7
Red Hat Red Hat Enterprise Linux 8 8100020260904155442.25e700aa ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 8040020260901171549.96015a92 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 8040020260901171549.96015a92 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 8060020260901145727.824efc52 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 8060020260901145727.824efc52 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 8080020260831180218.6dbb3803 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 8080020260831180218.6dbb3803 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red Hat Red Hat Enterprise Linux 9 0:2.8.0-10.el9_8 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.2.4-22.el9_2 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:2.4.5-29.el9_4 ~ * cpe:/a:redhat:rhel_e4s:9.4::appstream
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.6.1-24.el9_6 ~ * cpe:/a:redhat:rhel_eus:9.6::appstream
Red Hat Red Hat Directory Server 12 - cpe:/a:redhat:directory_server:12
Red Hat Red Hat Directory Server 13 - cpe:/a:redhat:directory_server:13

II. Public POCs for CVE-2026-18922

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III. Intelligence Information for CVE-2026-18922

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Vendor Advisories for CVE-2026-18922 (2)

Other References for CVE-2026-18922 (16)

Same Patch Batch · Red Hat · 2026-09-07 · 10 CVEs total

CVE-2026-76578 9.8 CRITICAL Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials vi
CVE-2026-86404 8.8 HIGH Artemis-server: artemis-jms-client: artemis-core-client: undertow-core: wildfly-messaging-
CVE-2026-19843 8.4 HIGH 389-ds-base: 389-ds-base: command injection via unescaped ldap dn in cockpit 389 console l
CVE-2026-79678 8.1 HIGH Freeipa: idm: freeipa: idp-add eval() reachable before authorization check allows environm
CVE-2026-18453 7.5 HIGH 389-ds-base: 389-ds-base: pre-authentication null pointer dereference via paged results an
CVE-2026-18355 7.5 HIGH 389-ds-base: 389-ds-base: heap buffer overflow via sasl wrapped-record length lower-bound
CVE-2026-76560 7.5 HIGH 389-ds-base: 389-ds: anonymous ldap client can defeat selfdn aci bind-rule checks via empt
CVE-2026-86332 6.5 MEDIUM Odh-dashboard: odh-dashboard: nim credential secret readable by any authenticated user
CVE-2026-86469 5.3 MEDIUM Glib2: toctou symlink race in `g_file_create_replace_destination` fallback path

IV. Related Vulnerabilities

Same product: Red Hat Directory Server 11.7 E4S for RHEL 8
Same vendor: Red Hat
Same weakness: CWE-287

V. Comments for CVE-2026-18922

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