CVE-2026-5308

MEDIUM

Missing request body size limits on Zoom plugin HTTP endpoints

Title source: cna
STIX 2.1

Description

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

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory
MMSA-2026-00646
https://mattermost.com/security-updates

Scores

CVSS v3 4.9
EPSS 0.0004
EPSS Percentile 11.1%
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-400
Status published
Products (9)
Mattermost/Mattermost 10.11.0 - 10.11.14
Mattermost/Mattermost 10.11.15
Mattermost/Mattermost 11.4.0 - 11.4.4
Mattermost/Mattermost 11.4.5
Mattermost/Mattermost 11.5.0 - 11.5.3
Mattermost/Mattermost 11.5.4
Mattermost/Mattermost 11.6.0
Mattermost/Mattermost 11.6.1
Mattermost/Mattermost 11.7.0
Published May 22, 2026
Tracked Since May 22, 2026