{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"ruby-sinatra","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":[],"id":"tcs_01M5NP54HSZ12AQ3FCS295WW5N","modified_at":"2026-10-23T17:47:32.516229901Z","published_at":"2025-10-10T20:15:38.067Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-61921","https://security-tracker.debian.org/tracker/CVE-2025-61921"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-61921#Debian:13/ruby-sinatra","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-61921"}],"summary":"Sinatra is a domain-specific language for creating web applications in Ruby. In versions prior to 4.2.0, there is a denial of service vulnerability in the `If-Match` and `If-None-Match` header parsing"}