GHSA-x274-8qfc-hrgf

Source

https://github.com/advisories/GHSA-x274-8qfc-hrgf

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-x274-8qfc-hrgf/GHSA-x274-8qfc-hrgf.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-x274-8qfc-hrgf

Aliases

CVE-2026-21388
GO-2026-5734

Published

2026-04-09T12:31:11Z

Modified

2026-06-25T23:11:44Z

Severity

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

Summary

Mattermost MS Teams plugin doesn't limit the request body size on the /lifecycle webhook endpoint

Details

Mattermost Plugins versions <=2.3.1 fail to limit the request body size on the {{/lifecycle}} webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00610.

Database specific

{
    "cwe_ids":  [
        "CWE-770"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-04-29T20:39:22Z",
    "nvd_published_at":  "2026-04-09T11:16:20Z",
    "severity":  "LOW"
}

References

Affected packages

Go / github.com/mattermost/mattermost-plugin-msteams

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.15.1-0.20260213190728-6fe4d295592e

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-x274-8qfc-hrgf/GHSA-x274-8qfc-hrgf.json"