{"action":"Upgrade mail to 2.9.1 or later.","affected":[{"fixed":"2.9.1","introduced":"0"}],"component":"mail","cve_ids":["CVE-2026-63435"],"ecosystem":"RubyGems","epss":0.00448,"exploited":false,"fixed_versions":["2.9.1"],"ghsa_id":"GHSA-mvxr-6m87-mv2q","id":"tcs_01M5KEMBV7DMFS00D4J2SNDM4R","modified_at":"2026-09-10T03:50:54.686601853Z","published_at":"2026-09-02T22:02:32Z","references":["https://osv.dev/vulnerability/GHSA-mvxr-6m87-mv2q","https://github.com/mikel/mail/security/advisories/GHSA-mvxr-6m87-mv2q","https://nvd.nist.gov/vuln/detail/CVE-2026-63435","https://github.com/mikel/mail/pull/1664","https://github.com/mikel/mail/commit/f9d59c2e447af42e2c3dec5a56b1bb25c7292859","https://github.com/mikel/mail","https://github.com/mikel/mail/releases/tag/2.9.1"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-mvxr-6m87-mv2q","url":"https://osv.dev/vulnerability/GHSA-mvxr-6m87-mv2q"}],"summary":"Mail: Email address spoofing via malformed RFC 2047 encoded-words"}