GHSA-h998-hxxj-8q83

Suggest an improvement
Source
https://github.com/advisories/GHSA-h998-hxxj-8q83
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-h998-hxxj-8q83/GHSA-h998-hxxj-8q83.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-h998-hxxj-8q83
Aliases
Published
2026-06-22T15:30:46Z
Modified
2026-09-15T20:00:39Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
Mattermost doesn't invalidate cached authentication state for active WebSocket connections during global session revocation
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 invalidate cached authentication state for active WebSocket connections during global session revocation, which allows a user with an existing WebSocket connection to remain authenticated and continue receiving real-time events until the cached session expires or the client reconnects.. Mattermost Advisory ID: MMSA-2026-00664

Database specific 
{
    "cwe_ids":  [
        "CWE-613"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-09-15T19:51:33Z",
    "nvd_published_at":  "2026-06-22T14:17:55Z",
    "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-h998-hxxj-8q83/GHSA-h998-hxxj-8q83.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-h998-hxxj-8q83/GHSA-h998-hxxj-8q83.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-h998-hxxj-8q83/GHSA-h998-hxxj-8q83.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-h998-hxxj-8q83/GHSA-h998-hxxj-8q83.json"