CVE-2026-7184CWE-201

Mattermost Remote Cluster PATCH API Leaks Authentication Tokens

Medium · published June 12, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
37.1
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00438 · 37.1th percentile
Weakness
CWE-201 · Insertion of Sensitive Information Into Sent Data
Published
2026-06-12T15:49Z
EPSS history
Timeline
  • 12 JUN 15:49Z
    Mattermost Remote Cluster PATCH API Leaks Authentication Tokens
    cvelistv5