{"id":"GHSA-m3p3-8frq-q7qh","summary":"Mattermost doesn't limit the size of the request body on the start meeting API endpoint","details":"Mattermost versions 11.5.x \u003c= 11.5.1, 10.11.x \u003c= 10.11.13, 11.4.x \u003c= 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","aliases":["CVE-2026-2325","GO-2026-5489"],"modified":"2026-06-25T23:11:05.117723433Z","published":"2026-05-18T09:31:47Z","database_specific":{"cwe_ids":["CWE-770"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-06-01T15:51:34Z","nvd_published_at":"2026-05-18T08:16:13Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2325"},{"type":"WEB","url":"https://github.com/mattermost/mattermost-plugin-msteams-meetings/commit/c5892dd169de865504afa2dd02eaeb6287489f7f"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"affected":[{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"11.5.0"},{"fixed":"11.5.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-m3p3-8frq-q7qh/GHSA-m3p3-8frq-q7qh.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"10.11.0"},{"fixed":"10.11.14"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-m3p3-8frq-q7qh/GHSA-m3p3-8frq-q7qh.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"11.4.0"},{"fixed":"11.4.4"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-m3p3-8frq-q7qh/GHSA-m3p3-8frq-q7qh.json"}},{"package":{"name":"github.com/mattermost/mattermost-plugin-msteams-meetings","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-plugin-msteams-meetings"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.1.1-0.20260213105619-c5892dd169de"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-m3p3-8frq-q7qh/GHSA-m3p3-8frq-q7qh.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"}]}