{"id":"EUVD-2026-30741","revision":"4cd7a3d8b042411bac928e6eb02460b6","records":[{"revision":"4cd7a3d8b042411bac928e6eb02460b6","observedAt":"2026-10-30T05:57:00.216+00:00","statement":{"source":"euvd","id":"EUVD-2026-30741","aliases":["CVE-2026-3637","GHSA-v549-xx3c-6pc8"],"title":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to check the create_post channel permission during post edit operations which allows an authenticated attacker with revoked posting privileges to modify their …","description":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to check the create_post channel permission during post edit operations which allows an authenticated attacker with revoked posting privileges to modify their existing posts via direct API requests to the post update and patch endpoints.. Mattermost Advisory ID: MMSA-2026-00627","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3,"severity":null}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30741","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 18, 2026, 6:53:29 AM","dateUpdated":"May 18, 2026, 2:35:00 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-30741","identifiers":["EUVD-2026-30741","CVE-2026-3637","GHSA-v549-xx3c-6pc8"]},"retained":false,"historicalAffected":[]}],"coverage":[]}