CVE-2026-2325

published 2026-05-18

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 API endpoint, which…

Priority P3 37 medium 6.5 CVSS 3.1

AV N AC L PR L UI N S U C N I N A H

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

Affected

10 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost-plugin-msteams-meetings	>= 0 < 1.1.1-0.20260213105619-c5892dd169de	1.1.1-0.20260213105619-c5892dd169de
github.com	mattermost_mattermost-server	>= 10.11.0 < 10.11.14	10.11.14
github.com	mattermost_mattermost-server	>= 11.4.0 < 11.4.4	11.4.4
github.com	mattermost_mattermost-server	>= 11.5.0 < 11.5.2	11.5.2
mattermost	mattermost	10.11.0 – 10.11.13	—
mattermost	mattermost	11.4.0 – 11.4.3	—
mattermost	mattermost	11.5.0 – 11.5.1	—
mattermost	mattermost_server	>= 10.11.0 < 10.11.14	10.11.14
mattermost	mattermost_server	>= 11.4.0 < 11.4.4	11.4.4
mattermost	mattermost_server	>= 11.5.0 < 11.5.2	11.5.2

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