GHSA-jmvr-r5hm-fxfr

Source

https://github.com/advisories/GHSA-jmvr-r5hm-fxfr

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-jmvr-r5hm-fxfr/GHSA-jmvr-r5hm-fxfr.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-jmvr-r5hm-fxfr

Aliases

CVE-2026-5308

Published

2026-05-26T13:30:15Z

Modified

2026-06-29T22:45:16.406229541Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

Mattermost doesn't enforce request body size limits on plugin HTTP endpoints

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 enforce request body size limits on plugin HTTP endpoints which allows an attacker to cause a denial of service via crafted oversized HTTP requests.. Mattermost Advisory ID: MMSA-2026-00646

Database specific

{
    "github_reviewed_at": "2026-06-29T22:41:48Z",
    "nvd_published_at": "2026-05-22T11:16:23Z",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-400"
    ],
    "severity": "HIGH"
}

References

Affected packages

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-jmvr-r5hm-fxfr/GHSA-jmvr-r5hm-fxfr.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-jmvr-r5hm-fxfr/GHSA-jmvr-r5hm-fxfr.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-jmvr-r5hm-fxfr/GHSA-jmvr-r5hm-fxfr.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-jmvr-r5hm-fxfr/GHSA-jmvr-r5hm-fxfr.json"

github.com/mattermost/mattermost-plugin-github

Package

Name: github.com/mattermost/mattermost-plugin-github; View open source insights on deps.dev
Purl: pkg:golang/github.com/mattermost/mattermost-plugin-github

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.0.1-0.20260410143745-9b41b1fd43c4

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-jmvr-r5hm-fxfr/GHSA-jmvr-r5hm-fxfr.json"