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CVE-2026-19601 Details

Description

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

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:4.9 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://mattermost.com/security-updates	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-201	Insertion of Sensitive Information Into Sent Data	[email protected]

Affected Products

Product	Versions
mattermost mattermost server	>= 11.7.0, < 11.7.11 >= 11.8.0, < 11.8.6 >= 11.9.0, < 11.9.2 >= 11.10.0, < 11.10.2
CPE cpe:2.3:a:mattermost:mattermost_server:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 29, 2026	Initial Analysis	[email protected]
Oct 16, 2026	CVE Modified	CISA-ADP
Oct 16, 2026	New CVE Received	[email protected]