{"id":"GO-2026-6483","summary":"Mattermost doesn't authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to inject a rogue sharedSecret in github.com/mattermost/mattermost-server","details":"Mattermost doesn't authenticate Atlassian Connect installed callbacks, allowing a remote unauthenticated attacker to inject a rogue sharedSecret in github.com/mattermost/mattermost-server","aliases":["CVE-2026-6673","GHSA-jqgv-39mg-7c2r"],"modified":"2026-09-28T17:00:16.000604549Z","published":"2026-09-28T16:43:40Z","database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-6483","review_status":"UNREVIEWED"},"references":[{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-jqgv-39mg-7c2r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6673"},{"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-2026-6483.json"}}],"schema_version":"1.9.0"}