{"action":"Upgrade puma to 3.12.4-1 or later.","affected":[{"fixed":"3.12.4-1","introduced":"0"}],"component":"puma","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["3.12.4-1"],"id":"tcs_01M5NF4FX3HXH58EMPAGTG2BBQ","modified_at":"2026-10-26T12:02:04.906332724Z","published_at":"2020-03-02T16:15:12.330Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2020-5249","https://security-tracker.debian.org/tracker/CVE-2020-5249"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2020-5249","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2020-5249"}],"summary":"In Puma (RubyGem) before 4.3.3 and 3.12.4, if an application using Puma allows untrusted input in an early-hints header, an attacker can use a carriage return character to end the header and inject ma"}