GHSA-m3p3-8frq-q7qh
Mattermost doesn't limit the size of the request body on the start meeting API endpoint
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | >= 11.5.0, < 11.5.2 | 11.5.2 |
| Go | github.com/mattermost/mattermost-server | >= 10.11.0, < 10.11.14 | 10.11.14 |
| Go | github.com/mattermost/mattermost-server | >= 11.4.0, < 11.4.4 | 11.4.4 |
| Go | github.com/mattermost/mattermost-plugin-msteams-meetings | < 1.1.1-0.20260213105619-c5892dd169de | 1.1.1-0.20260213105619-c5892dd169de |
Details
As written in the advisory (Markdown source, shown as plain text).
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
References
External links from the advisory. They lead to third-party sites.