{"id":"GO-2026-5484","revision":"4167853b98ed44da89e783566f3f9d46","records":[{"revision":"4167853b98ed44da89e783566f3f9d46","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5484","aliases":["CVE-2026-3495","GHSA-jx93-pf6x-874r"],"title":"Mattermost doesn't escape some variables that could contain malicious content during error page composition in github.com/mattermost/mattermost-server","description":"Mattermost doesn't escape some variables that could contain malicious content during error page composition 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/v5 before v5.3.2-0.20260310115442-5a1ea95044dc; github.com/mattermost/mattermost/server/v8 before v8.0.0-20260310115442-5a1ea95044d.","state":0,"publishedAt":"2026-06-25T22:34:31+00:00","modifiedAt":"2026-06-25T23:01:18.2417158+00:00","affected":[{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"10.11.0+incompatible"},{"kind":"fixed","version":"10.11.14+incompatible"},{"kind":"introduced","version":"11.5.0+incompatible"},{"kind":"fixed","version":"11.5.2+incompatible"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v5","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost-server/v6","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/mattermost/mattermost/server/v8","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/advisories/GHSA-jx93-pf6x-874r","https://nvd.nist.gov/vuln/detail/CVE-2026-3495","https://github.com/mattermost/mattermost/commit/5a1ea95044dc2d1ca601bfe9a4c1bc17990f3872","https://mattermost.com/security-updates"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5484","license":"OSV · upstream source license applies","key":"osv:GO-2026-5484","identifiers":["GO-2026-5484","CVE-2026-3495","GHSA-jx93-pf6x-874r"]},"retained":false,"historicalAffected":[]}],"coverage":[]}