CVE-2026-24661

published 2026-04-09

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 authenticated attacker to cause…

Priority P4 34 medium 6.5 CVSS 3.1

AV N AC L PR L UI N S U C N I N A H

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

Affected

3 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost-plugin-msteams	>= 0 < 1.15.1-0.20260213190728-6fe4d295592e	1.15.1-0.20260213190728-6fe4d295592e
mattermost	mattermost	< 2.3.2.0	2.3.2.0
mattermost	mattermost	<= 2.1.3	—

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