VulnTideExploited vulnerabilities, by vendor. Data as of .
Not in CISA KEVPublished CVSS 9.8 criticalEPSS 0.6% probability of exploitation in 30 daysFound by AI: OpenAI
Red Hat

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

Is it exploited?

Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.

How likely is exploitation in the next 30 days?
0.6%

EPSS score, percentile 46.6 of all scored records. A probability estimated by FIRST, not a report of exploitation.

How severe?
9.8 Critical

CVSS v3.1 base score, given by the CNA

What should I do?

CISA has set no required action, because the vulnerability is not in KEV.

Advisories and patches (12)

Which versions are affected?

Unaffected 8060020260908152739.0ca98e7e; 8080020260903102346.f969626e; 8100020260904171440.37ed7c03; 9020020260903155914.1674d574; 9040020260903102623.1674d574; 0:3.2.0-10.el10_2; and 14 more

Versions by product

Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.

What to do

Workaround (from the CVE record)

Administrators can restrict nsslapd-allowed-sasl-mechanisms to only the mechanisms actually required (e.g. GSSAPI, EXTERNAL, GSS-SPNEGO), excluding PLAIN. Since the exploit chain requires the first bind attempt to be a failed SASL PLAIN bind as cn=Directory Manager, removing PLAIN from the allowed mechanism list prevents that step entirely — this blocks both the originally reported variant (valid low-privileged account) and the zero-credential SASL ANONYMOUS variant, since both depend on the same initial PLAIN bind to plant the stale identity.

Advisories and patches

This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.

Affected products and versions

As listed in the CVE record.

Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8
StatusVersions
Unaffected8060020260908152739.0ca98e7e

Versions not listed are: affected.

Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8
StatusVersions
Unaffected8080020260903102346.f969626e

Versions not listed are: affected.

Red Hat Red Hat Directory Server 11.9 for RHEL 8
StatusVersions
Unaffected8100020260904171440.37ed7c03

Versions not listed are: affected.

Red Hat Red Hat Directory Server 12.2 E4S for RHEL 9
StatusVersions
Unaffected9020020260903155914.1674d574

Versions not listed are: affected.

Red Hat Red Hat Directory Server 12.4 E4S for RHEL 9
StatusVersions
Unaffected9040020260903102623.1674d574

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 10
StatusVersions
Unaffected0:3.2.0-10.el10_2

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
StatusVersions
Unaffected0:3.0.6-21.el10_0

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION
StatusVersions
Unaffected0:1.2.11.15-97.el6_10.1

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
StatusVersions
Unaffected0:1.3.11.1-15.el7_9

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 8
StatusVersions
Unaffected8100020260904155442.25e700aa

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
StatusVersions
Unaffected8040020260901171549.96015a92

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
StatusVersions
Unaffected8040020260901171549.96015a92

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
StatusVersions
Unaffected8060020260901145727.824efc52

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
StatusVersions
Unaffected8060020260901145727.824efc52

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
StatusVersions
Unaffected8080020260831180218.6dbb3803

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
StatusVersions
Unaffected8080020260831180218.6dbb3803

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 9
StatusVersions
Unaffected0:2.8.0-10.el9_8

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
StatusVersions
Unaffected0:2.2.4-22.el9_2

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
StatusVersions
Unaffected0:2.4.5-29.el9_4

Versions not listed are: affected.

Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
StatusVersions
Unaffected0:2.6.1-24.el9_6

Versions not listed are: affected.

Versions the record lists as unaffected: 8060020260908152739.0ca98e7e, 8080020260903102346.f969626e, 8100020260904171440.37ed7c03, 9020020260903155914.1674d574, 9040020260903102623.1674d574, 0:3.2.0-10.el10_2, 0:3.0.6-21.el10_0, 0:1.2.11.15-97.el6_10.1.

Source: CVE List, as of . About the data.

About this vulnerability

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 pa…

Summary: CVE record, as of .

  • CISA has not added CVE-2026-18922 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
  • The CVE record was published on 7 Sep 2026.
  • The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), given by its CNA.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.6% (percentile 46.6), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
  • CISA's SSVC assessment in the CVE record: exploitation none, automatable no, technical impact total.
  • The credits in the CVE record name OpenAI as finder.

Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.

Description

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

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 List, as of . About the data.

Weakness

CWE-287

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.

Timeline

DateEvent
CVE record published
CVE record last updated

References

7

    7 more in the CVE record.

    Known exploited Red Hat vulnerabilities

    • CVE-2015-3246: Red Hat Libuser Race Condition Vulnerability (added )
    • CVE-2015-5287: Red Hat Automatic Bug Reporting Tool Privilege Escalation Vulnerability (added )
    • CVE-2018-14667: Red Hat JBoss RichFaces Framework Expression Language Injection Vulnerability (added )
    • CVE-2021-3560: Red Hat Polkit Incorrect Authorization Vulnerability (added )
    • CVE-2021-4034: Red Hat Polkit Out-of-Bounds Read and Write Vulnerability (added )