CVE-2026-19601CWE-201

CVE-2026-19601

Medium · published October 16, 2026

CVSS v3.1
4.9
EPSS
0%
Percentile
13.5
In the wild
Unconfirmed
What it is

Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 fail to invalidate the stored AD/LDAP bind password when other connection settings (such as the server address) are changed, which allows a System Console administrator to disclose the plaintext bind password to an attacker-controlled server via the Test Connection / diagnostics feature. Mattermost Advisory ID: MMSA-2026-00764

The record
Technical detail
CVSS v3.1
4.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00234 · 13.5th percentile
Weakness
CWE-201 · Insertion of Sensitive Information Into Sent Data
Published
2026-10-16T11:17Z
References (1)
https://mattermost.com/security-updates · [email protected]
EPSS history
Timeline
  • 17 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 16 OCT 06:58Z
    Disclosure of AD/LDAP bind password via Test Connection
    cvelistv5
  • 16 OCT 06:58Z
    Disclosure of AD/LDAP bind password via Test Connection
    cvelistv5