GitHub Advisoryadvisory · Go

GHSA-m3p3-8frq-q7qh Mattermost doesn't limit the size of the request body on the start meeting API endpoint

MEDIUM Published 2026-05-18 Modified 2026-06-01 Official page ↗
Aliases
CVE-2026-2325
Ecosystem
Go
Packages
github.com/mattermost/mattermost-server, github.com/mattermost/mattermost-plugin-msteams-meetings
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-770
Reviewed
2026-06-01

Affected packages

• Go github.com/mattermost/mattermost-server: >= 11.5.0, < 11.5.2 → fixed in 11.5.2 • Go github.com/mattermost/mattermost-server: >= 10.11.0, < 10.11.14 → fixed in 10.11.14 • Go github.com/mattermost/mattermost-server: >= 11.4.0, < 11.4.4 → fixed in 11.4.4 • Go github.com/mattermost/mattermost-plugin-msteams-meetings: < 1.1.1-0.20260213105619-c5892dd169de → fixed in 1.1.1-0.20260213105619-c5892dd169de

Description

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to limit the size of the request body on the start meeting API endpoint, which allows an authenticated attacker to cause resource exhaustion or denial of service via a crafted oversized HTTP POST request to {{/api/v1/meetings}}.. Mattermost Advisory ID: MMSA-2026-00608

Related

Alias · CVE (1)

  • CVE-2026-2325 Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to limit the size of the request body on the start meeting… vulnerability

Weakness · CWE (1)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References