CVE-2026-7184

Mattermost Remote Cluster PATCH API Leaks Authentication Tokens

State: Published
Severity: 6.5 Medium
Published: Jun 12, 2026
Updated: Jun 12, 2026
Reserved: Apr 27, 2026

Description

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15 fail to sanitize the Remote Cluster API response on PATCH operations, which allows authenticated users with the {{manage_secure_connections}} permission to obtain remote cluster authentication tokens via a PATCH request to the remote cluster endpoint.. Mattermost Advisory ID: MMSA-2026-00662

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	Mattermost

Weaknesses

CWE-201 Insertion of Sensitive Information Into Sent Data

Affected Products

Product	Versions
MattermostMattermost	11.6.0 through 11.6.1Affected 11.5.0 through 11.5.4Affected 10.11.0 through 10.11.15Affected 11.7.0Not affected 11.6.2Not affected 11.5.5Not affected 10.11.17Not affected

References

MMSA-2026-00662vendor-advisory

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