GHSA-7pf2-9c95-w332

Suggest an improvement
Source
https://github.com/advisories/GHSA-7pf2-9c95-w332
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-7pf2-9c95-w332/GHSA-7pf2-9c95-w332.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-7pf2-9c95-w332
Aliases
Published
2026-05-26T13:30:15Z
Modified
2026-07-07T16:11:24.216662055Z
Severity
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N CVSS Calculator
Summary
Mattermost doesn't validate file ownership and access control
Details

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to validate file ownership and access control, which allows an authenticated user to access and download files belonging to other users or teams via crafted Boards API requests using valid file IDs. Mattermost Advisory ID: MMSA-2026-00620.

Database specific 
{
    "github_reviewed": true,
    "nvd_published_at": "2026-05-22T11:16:22Z",
    "cwe_ids": [
        "CWE-639"
    ],
    "severity": "HIGH",
    "github_reviewed_at": "2026-06-26T22:48:15Z"
}
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/2026/05/GHSA-7pf2-9c95-w332/GHSA-7pf2-9c95-w332.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
11.5.4

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-7pf2-9c95-w332/GHSA-7pf2-9c95-w332.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
11.4.0
Fixed
11.4.5

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-7pf2-9c95-w332/GHSA-7pf2-9c95-w332.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
10.11.15

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-7pf2-9c95-w332/GHSA-7pf2-9c95-w332.json"