CVE-2026-19601

Name of the Vulnerable Software and Affected Versions Mattermost versions 11.7.0 through 11.7.10 Mattermost versions 11.8.0 through 11.8.5 Mattermost versions 11.9.0 through 11.9.1 Mattermost versions 11.10.0 through 11.10.1

Description The software fails to invalidate the stored AD/LDAP bind password when other connection settings, such as the server address, are modified. This allows a System Console administrator to inadvertently disclose the plaintext bind password to an attacker-controlled server through the Test Connection / diagnostics feature.

Recommendations Update Mattermost versions 11.7.0 through 11.7.10 to a version newer than 11.7.10. Update Mattermost versions 11.8.0 through 11.8.5 to a version newer than 11.8.5. Update Mattermost versions 11.9.0 through 11.9.1 to a version newer than 11.9.1. Update Mattermost versions 11.10.0 through 11.10.1 to a version newer than 11.10.1.