GHSA-2g8v-grq3-hq2g

Suggest an improvement
Source
https://github.com/advisories/GHSA-2g8v-grq3-hq2g
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-2g8v-grq3-hq2g/GHSA-2g8v-grq3-hq2g.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-2g8v-grq3-hq2g
Aliases
Published
2026-06-22T15:30:45Z
Modified
2026-09-15T20:00:39Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
Summary
Mattermost doesn't enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab connect}} command handler
Details

Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab connect}} command handler, which allows any authenticated user to overwrite the global default GitLab instance configuration via the {{/gitlab connect }} slash command.. Mattermost Advisory ID: MMSA-2026-00644

Database specific 
{
    "cwe_ids":  [
        "CWE-862"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-09-15T19:51:08Z",
    "nvd_published_at":  "2026-06-22T14:17:50Z",
    "severity":  "MODERATE"
}
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
11.7.0
Fixed
11.7.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-2g8v-grq3-hq2g/GHSA-2g8v-grq3-hq2g.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
11.6.0
Fixed
11.6.3

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-2g8v-grq3-hq2g/GHSA-2g8v-grq3-hq2g.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
11.5.6

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-2g8v-grq3-hq2g/GHSA-2g8v-grq3-hq2g.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
10.11.18

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-2g8v-grq3-hq2g/GHSA-2g8v-grq3-hq2g.json"