{"schema_version":"1.3.1","id":"GO-2026-5522","modified":"2026-06-25T22:34:34Z","published":"2026-06-25T22:34:34Z","aliases":["CVE-2026-27769","GHSA-mxxh-fmjq-j6x4"],"summary":"Mattermost doesn't validate whether users were correctly owned by the correct Connected Workspace in github.com/mattermost/mattermost-server","details":"Mattermost doesn't validate whether users were correctly owned by the correct Connected Workspace in github.com/mattermost/mattermost-server.\n\nNOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.\n\n(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)\n\nThe additional affected modules and versions are: github.com/mattermost/mattermost-server from v8.0.0-20250721062209-4952acea88ce before v8.0.0-20260316060126-bc1a2b34b1f9.","affected":[{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"ecosystem_specific":{"custom_ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0-20250721062209-4952acea88ce"},{"fixed":"8.0.0-20260316060126-bc1a2b34b1f9"}]}]}}],"references":[{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-mxxh-fmjq-j6x4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27769"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-5522","review_status":"UNREVIEWED"}}