{"id":"GO-2026-6480","summary":"Mattermost doesn't enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab connect}} command handler in github.com/mattermost/mattermost-server","details":"Mattermost doesn't enforce administrator authorization on the {{setDefaultInstance}} call within the {{/gitlab connect}} command handler in github.com/mattermost/mattermost-server","aliases":["CVE-2026-5139","GHSA-2g8v-grq3-hq2g"],"modified":"2026-09-28T17:00:16.149696592Z","published":"2026-09-28T16:43:40Z","database_specific":{"review_status":"UNREVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-6480"},"references":[{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-2g8v-grq3-hq2g"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5139"},{"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":"10.11.0+incompatible"},{"fixed":"10.11.18+incompatible"},{"introduced":"11.5.0+incompatible"},{"fixed":"11.5.6+incompatible"},{"introduced":"11.6.0+incompatible"},{"fixed":"11.6.3+incompatible"},{"introduced":"11.7.0+incompatible"},{"fixed":"11.7.1+incompatible"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-6480.json"}}],"schema_version":"1.9.0"}