GitHub Advisoryadvisory · Go

GHSA-5rfv-h47g-xj42 Mattermost MS Teams plugin doesn't limit the request body size on the /changes webhook endpoint

MEDIUM Published 2026-04-09 Modified 2026-04-29 Official page ↗
Aliases
CVE-2026-24661
Ecosystem
Go
Packages
github.com/mattermost/mattermost-plugin-msteams
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-770
Reviewed
2026-04-29

Affected packages

• Go github.com/mattermost/mattermost-plugin-msteams: < 1.15.1-0.20260213190728-6fe4d295592e → fixed in 1.15.1-0.20260213190728-6fe4d295592e

Description

Mattermost Plugins versions <=2.1.3.0 fail to limit the request body size on the {{/changes}} 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-2026-00611.

Related

Alias · CVE (1)

  • CVE-2026-24661 Mattermost Plugins versions <=2.1.3.0 fail to limit the request body size on the {{/changes}} webhook endpoint which allows an… vulnerability

Weakness · CWE (1)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References