{"action":"Upgrade rack to 3.2.6 or later.","affected":[{"fixed":"3.2.6","introduced":"3.2.0"}],"component":"rack","cve_ids":["CVE-2026-26962"],"ecosystem":"RubyGems","epss":0.00227,"exploited":false,"fixed_versions":["3.2.6"],"ghsa_id":"GHSA-rx22-g9mx-qrhv","id":"tcs_01M5KENCDY0Y72778XVGD4ZZYM","modified_at":"2026-09-10T03:51:03.209768917Z","published_at":"2026-04-02T20:31:01Z","references":["https://osv.dev/vulnerability/GHSA-rx22-g9mx-qrhv","https://github.com/rack/rack/security/advisories/GHSA-rx22-g9mx-qrhv","https://nvd.nist.gov/vuln/detail/CVE-2026-26962","https://github.com/rack/rack","https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2026-26962.yml"],"severity":{"label":"medium","score":4.8},"sources":[{"source":"osv","source_id":"GHSA-rx22-g9mx-qrhv","url":"https://osv.dev/vulnerability/GHSA-rx22-g9mx-qrhv"}],"summary":"Rack's improper unfolding of folded multipart headers preserves CRLF in parsed parameter values"}