{"id":"EUVD-2026-38246","revision":"bf13e588ecee4fee80ff152ad8079b6c","records":[{"revision":"bf13e588ecee4fee80ff152ad8079b6c","observedAt":"2026-11-01T09:13:27.498+00:00","statement":{"source":"euvd","id":"EUVD-2026-38246","aliases":["CVE-2026-5139","GHSA-2g8v-grq3-hq2g"],"title":"Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab connect}} command handler, which allows any au…","description":"Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab connect}} command handler, which allows any authenticated user to overwrite the global default GitLab instance configuration via the {{/gitlab connect <instance-name>}} slash command.. Mattermost Advisory ID: MMSA-2026-00644","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:L","score":5.4,"severity":null}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-38246","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 22, 2026, 1:34:21 PM","dateUpdated":"Jun 22, 2026, 3:39:29 PM"},"relatedAdvisories":[{"id":"WID-SEC-W-2026-1650","title":"Mattermost (Desktop, Server und Mobile): Mehrere Schwachstellen","vulnerabilityIds":["CVE-2026-5139","CVE-2026-6062","CVE-2026-6673","CVE-2026-8074","CVE-2026-9162","CVE-2026-22880"]}],"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-2026-38246","identifiers":["EUVD-2026-38246","CVE-2026-5139","GHSA-2g8v-grq3-hq2g"]},"retained":false,"historicalAffected":[]}],"coverage":[]}