{"id":"GHSA-m3p3-8frq-q7qh","revision":"cef44f334f44412bb1ecfc023c07474d","records":[{"revision":"cef44f334f44412bb1ecfc023c07474d","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-m3p3-8frq-q7qh","aliases":["CVE-2026-2325","GO-2026-5489"],"title":"Mattermost doesn't limit the size of the request body on the start meeting API endpoint","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","state":0,"publishedAt":"2026-05-18T09:31:47+00:00","modifiedAt":"2026-06-25T23:11:05.1177234+00:00","affected":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"11.5.0"},{"kind":"fixed","version":"11.5.2"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.11.0"},{"kind":"fixed","version":"10.11.14"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"11.4.0"},{"kind":"fixed","version":"11.4.4"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-plugin-msteams-meetings","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.1.1-0.20260213105619-c5892dd169de"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-2325","https://github.com/mattermost/mattermost-plugin-msteams-meetings/commit/c5892dd169de865504afa2dd02eaeb6287489f7f","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"sourceUrl":"https://github.com/advisories/GHSA-m3p3-8frq-q7qh","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-m3p3-8frq-q7qh","identifiers":["GHSA-m3p3-8frq-q7qh","CVE-2026-2325","GO-2026-5489"]},"retained":false,"historicalAffected":[]}],"coverage":[]}