{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"github.com/mattermost/mattermost/server/v8","cve_ids":["CVE-2026-3495"],"ecosystem":"Go","epss":0.00143,"exploited":false,"fixed_versions":[],"ghsa_id":"GHSA-jx93-pf6x-874r","id":"tcs_01M5KGMMVDSD7CE99R4R6305J3","modified_at":"2026-06-25T23:01:18.241715773Z","published_at":"2026-06-25T22:34:31Z","references":["https://osv.dev/vulnerability/GO-2026-5484","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"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"GO-2026-5484#Go/github.com/mattermost/mattermost/server/v8","url":"https://osv.dev/vulnerability/GO-2026-5484"}],"summary":"Mattermost doesn't escape some variables that could contain malicious content during error page composition in github.com/mattermost/mattermost-server"}