GHSA-3c9r-7f29-qp32

Suggest an improvement
Source
https://github.com/advisories/GHSA-3c9r-7f29-qp32
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-3c9r-7f29-qp32/GHSA-3c9r-7f29-qp32.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-3c9r-7f29-qp32
Aliases
Published
2026-02-16T12:30:24Z
Modified
2026-03-27T17:33:36.248964Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
Mattermost fails to properly validate login method restrictions
Details

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate login method restrictions which allows an authenticated user to bypass SSO-only login requirements via userID-based authentication. Mattermost Advisory ID: MMSA-2025-00548

Database specific 
{
    "github_reviewed_at": "2026-02-19T19:34:56Z",
    "nvd_published_at": "2026-02-16T10:16:08Z",
    "cwe_ids": [
        "CWE-303"
    ],
    "github_reviewed": true,
    "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
0Unknown introduced version / All previous versions are affected
Fixed
8.0.0-20251212052346-61651b0df7ea

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-3c9r-7f29-qp32/GHSA-3c9r-7f29-qp32.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
11.1.0

Database specific

last_known_affected_version_range 
"< 11.1.3"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-3c9r-7f29-qp32/GHSA-3c9r-7f29-qp32.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

Database specific

last_known_affected_version_range 
"< 10.11.10"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-3c9r-7f29-qp32/GHSA-3c9r-7f29-qp32.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
11.2.0

Database specific

last_known_affected_version_range 
"< 11.2.2"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-3c9r-7f29-qp32/GHSA-3c9r-7f29-qp32.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
0Unknown introduced version / All previous versions are affected
Fixed
5.3.2-0.20251212052346-61651b0df7ea

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-3c9r-7f29-qp32/GHSA-3c9r-7f29-qp32.json"