{"id":"GHSA-5rfv-h47g-xj42","summary":"Mattermost MS Teams plugin doesn't limit the request body size on the /changes webhook endpoint","details":"Mattermost Plugins versions \u003c=2.1.3.0 fail to limit the request body size on the {{/changes}} webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00611.","aliases":["CVE-2026-24661","GO-2026-5153"],"modified":"2026-06-25T18:56:26.987666282Z","published":"2026-04-09T12:31:11Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-04-29T20:38:59Z","nvd_published_at":"2026-04-09T11:16:21Z","cwe_ids":["CWE-770"]},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24661"},{"type":"WEB","url":"https://github.com/mattermost/mattermost-plugin-msteams/commit/6fe4d295592ecc8767d67e69286cbeec01be3210"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost-plugin-msteams"},{"type":"WEB","url":"https://github.com/mattermost/mattermost-plugin-msteams/releases/tag/v2.3.2"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"affected":[{"package":{"name":"github.com/mattermost/mattermost-plugin-msteams","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-plugin-msteams"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.15.1-0.20260213190728-6fe4d295592e"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-5rfv-h47g-xj42/GHSA-5rfv-h47g-xj42.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:H"}]}