GHSA-9p44-r552-4wp9

Suggest an improvement
Source
https://github.com/advisories/GHSA-9p44-r552-4wp9
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9p44-r552-4wp9/GHSA-9p44-r552-4wp9.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-9p44-r552-4wp9
Aliases
Published
2026-06-12T18:31:59Z
Modified
2026-08-26T01:21:46.144329879Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Mattermost doesn't sanitize the Remote Cluster API response on PATCH operations
Details

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 {{managesecureconnections}} permission to obtain remote cluster authentication tokens via a PATCH request to the remote cluster endpoint. Mattermost Advisory ID: MMSA-2026-00662

Database specific 
{
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-24T21:48:36Z",
    "nvd_published_at": "2026-06-12T17:16:27Z",
    "severity": "MODERATE",
    "cwe_ids": [
        "CWE-201"
    ]
}
References

Affected packages

Go
github.com/mattermost/mattermost-server

Package

Name
github.com/mattermost/mattermost-server
View open source insights on deps.dev
Purl
pkg:golang/github.com/mattermost/mattermost-server

Affected ranges

Type
SEMVER
Events
Introduced
11.6.0
Fixed
11.6.1

Affected versions

11.*
11.6.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9p44-r552-4wp9/GHSA-9p44-r552-4wp9.json"
github.com/mattermost/mattermost-server

Package

Name
github.com/mattermost/mattermost-server
View open source insights on deps.dev
Purl
pkg:golang/github.com/mattermost/mattermost-server

Affected ranges

Type
SEMVER
Events
Introduced
11.5.0
Fixed
11.5.5

Database specific

last_known_affected_version_range 
"<= 11.5.4"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9p44-r552-4wp9/GHSA-9p44-r552-4wp9.json"
github.com/mattermost/mattermost-server

Package

Name
github.com/mattermost/mattermost-server
View open source insights on deps.dev
Purl
pkg:golang/github.com/mattermost/mattermost-server

Affected ranges

Type
SEMVER
Events
Introduced
10.11.0
Fixed
10.11.16

Database specific

last_known_affected_version_range 
"<= 10.11.15"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9p44-r552-4wp9/GHSA-9p44-r552-4wp9.json"
github.com/mattermost/mattermost/server/v8

Package

Name
github.com/mattermost/mattermost/server/v8
View open source insights on deps.dev
Purl
pkg:golang/github.com/mattermost/mattermost/server/v8

Affected ranges

Type
SEMVER
Events
Introduced
8.0.0-20250731163400-5b955468ea1e
Fixed
8.0.0-20260428142921-bd8fc9222672

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9p44-r552-4wp9/GHSA-9p44-r552-4wp9.json"