---
id: CVE-2026-18651
title: A flaw was found in 389 Directory Server
summary: >-
  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 re…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-287
vendor: redhat
product: directory_server
affected:
  - directory_server = 11.0
  - directory_server = 12.0
  - directory_server = 13.0
  - 389_directory_server
  - enterprise_linux = 7.0
  - enterprise_linux = 8.0
  - enterprise_linux = 9.0
  - enterprise_linux = 10.0
published: '2026-08-03'
updated: '2026-08-09'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18651'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-18651'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2510617'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00282
epssPercentile: 0.18461
ingestedAt: '2026-08-09T14:33:31.616Z'
---

## Overview

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.

## Affected

- `directory_server = 11.0`
- `directory_server = 12.0`
- `directory_server = 13.0`
- `389_directory_server`
- `enterprise_linux = 7.0`
- `enterprise_linux = 8.0`
- `enterprise_linux = 9.0`
- `enterprise_linux = 10.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.