LOW 3.7 Go
Mattermost MS Teams plugin doesn't limit the request body size on the /lifecycle webhook endpoint
GHSA-x274-8qfc-hrgf · CVE-2026-21388
Published · Modified
Description
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.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-21388
- WEB https://github.com/mattermost/mattermost-plugin-msteams/commit/6fe4d295592ecc8767d67e69286cbeec01be3210
- PACKAGE https://github.com/mattermost/mattermost-plugin-msteams
- WEB https://github.com/mattermost/mattermost-plugin-msteams/releases/tag/v2.3.2
- WEB https://mattermost.com/security-updates
Ready to move
Start Securing
Free, no credit card | First findings in minutes