GitHub Advisoryadvisory · Go

GHSA-9p44-r552-4wp9 Mattermost doesn't sanitize the Remote Cluster API response on PATCH operations

MEDIUM Published 2026-06-12 Modified 2026-08-24 Official page ↗
Aliases
CVE-2026-7184
Ecosystem
Go
Packages
github.com/mattermost/mattermost-server, github.com/mattermost/mattermost/server/v8
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-201
Reviewed
2026-08-24

Affected packages

• Go github.com/mattermost/mattermost-server: >= 11.6.0, < 11.6.1 → fixed in 11.6.1 • Go github.com/mattermost/mattermost-server: >= 11.5.0, < 11.5.5 → fixed in 11.5.5 • Go github.com/mattermost/mattermost-server: >= 10.11.0, < 10.11.16 → fixed in 10.11.16 • Go github.com/mattermost/mattermost/server/v8: >= 8.0.0-20250731163400-5b955468ea1e, < 8.0.0-20260428142921-bd8fc9222672 → fixed in 8.0.0-20260428142921-bd8fc9222672

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

Related

Alias · CVE (1)

  • CVE-2026-7184 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… vulnerability

Weakness · CWE (1)

  • CWE-201 Insertion of Sensitive Information Into Sent Data weakness

References