{"id":"GO-2026-4478","summary":"Mattermost Server SAML implementation does not require encryption or signature verification as default in github.com/mattermost/mattermost-server","details":"Mattermost Server SAML implementation does not require encryption or signature verification as default 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 before v3.8.1-0.20170504181128-4f074fed0d65.","aliases":["CVE-2017-18909","GHSA-r6j5-fqx9-7qv9"],"modified":"2026-02-19T20:41:06.840451Z","published":"2026-02-17T18:09:06Z","database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-4478","review_status":"UNREVIEWED"},"references":[{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-r6j5-fqx9-7qv9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18909"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/4f074fed0d653a28779ac586e418341232d43e95"},{"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":"0"}]}],"ecosystem_specific":{"custom_ranges":[{"events":[{"introduced":"0"},{"fixed":"3.8.1-0.20170504181128-4f074fed0d65"}],"type":"ECOSYSTEM"}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4478.json"}}],"schema_version":"1.7.3"}