CVE-2026-18651

A flaw was found in 389 Directory Server. During SASL PLAIN authentication, the server installs connection-level bind credentials before performing the account-lock check. If the account is subsequently found to be locked, the bind is reported as failed to the client, but the already-installed authenticated state on the connection is not reverted. A client that supplies valid credentials for an account that has been administratively locked can continue to use the same connection with that account's privileges, defeating account lock as an access-revocation control.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-18651	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2510617	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:redhat:directory_server:11.0:::::::*
	cpe:2.3:a:redhat:directory_server:12.0:::::::*
	cpe:2.3:a:redhat:directory_server:13.0:::::::*
	cpe:2.3:o:redhat:389_directory_server:-:::::::*
	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

No history.

Information

Published : 2026-08-03 16:16

Updated : 2026-08-09 13:54

NVD link : CVE-2026-18651

Mitre link : CVE-2026-18651

CVE.ORG link : CVE-2026-18651

JSON object : View

Products Affected

redhat

enterprise_linux
389_directory_server
directory_server

CWE

CWE-287

Improper Authentication

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