GHSA-rmhw-c3xr-m3xx

Suggest an improvement
Source
https://github.com/advisories/GHSA-rmhw-c3xr-m3xx
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-rmhw-c3xr-m3xx/GHSA-rmhw-c3xr-m3xx.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-rmhw-c3xr-m3xx
Aliases
Published
2026-03-25T18:31:53Z
Modified
2026-06-25T23:11:25Z
Severity
  • 4.6 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N CVSS Calculator
Summary
Mattermost doesn't properly validate CSRF tokens
Details

Mattermost versions 11.2.x <= 11.2.2, 10.11.x <= 10.11.10, 11.4.x <= 11.4.0, 11.3.x <= 11.3.1 fail to properly validate CSRF tokens in the /api/v4/access_control_policies/{policy_id}/activate endpoint, which allows an attacker to trick an admin into changing access control policy active status via a crafted request. Mattermost Advisory ID: MMSA-2026-00578

Database specific 
{
    "cwe_ids":  [
        "CWE-352"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-03-31T23:00:00Z",
    "nvd_published_at":  "2026-03-25T17:16:56Z",
    "severity":  "MODERATE"
}
References

Affected packages

Go
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
11.4.0-rc1
Fixed
11.4.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-rmhw-c3xr-m3xx/GHSA-rmhw-c3xr-m3xx.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
11.3.0-rc1
Fixed
11.3.2

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-rmhw-c3xr-m3xx/GHSA-rmhw-c3xr-m3xx.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
11.2.0-rc1
Fixed
11.2.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-rmhw-c3xr-m3xx/GHSA-rmhw-c3xr-m3xx.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
10.11.0-rc1
Fixed
10.11.11

Database specific

last_known_affected_version_range 
"< 10.11.1"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-rmhw-c3xr-m3xx/GHSA-rmhw-c3xr-m3xx.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
8.0.0-20260105080200-d27a2195068d
Fixed
10.11.11

Database specific

last_known_affected_version_range 
"< 8.0.0-20260217110922-b7d4a1f1f59b"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-rmhw-c3xr-m3xx/GHSA-rmhw-c3xr-m3xx.json"