MEDIUM 6.5 Go
Mattermost MS Teams plugin doesn't limit the request body size on the /changes webhook endpoint
GHSA-5rfv-h47g-xj42 · CVE-2026-24661 · GO-2026-5153
Published · Modified
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.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-24661
- 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
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