CVE-2026-5308 MEDIUM

CVE-2026-5308: Missing request body size limits on Zoom plugin HTTP endpoints

Vendor Mattermost
Product Mattermost
Weakness CWE-400
Published May 22, 2026
Last update May 22, 2026
View on NVD All CVEs

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to enforce request body size limits on plugin HTTP endpoints which allows an attacker to cause a denial of service via crafted oversized HTTP requests.. Mattermost Advisory ID: MMSA-2026-00646

Key dates

02Disclosure timeline

May 22, 2026 CVE published
May 22, 2026 Record updated