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CVE-2026-3116

MediumCVSS 4.9/10Last modified Jun 17, 2026

Description

Mattermost Plugins versions <=11.4 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to validate incoming request size which allows an authenticated attacker to cause service disruption via the webhook endpoint. Mattermost Advisory ID: MMSA-2026-00589

Metrics

CVSS 3.1 4.9/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Mattermost	Mattermost	<= 11.0.4; <= 11.1.3; <= 11.3.2; <= 10.11.11

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Mar 26, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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