{"action":"No fix published. Pin and monitor.","affected":[{"introduced":"0"}],"component":"h2o","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":[],"id":"tcs_01M5NSYPC0MHQD3YWBHYZW5T7B","modified_at":"2026-10-01T03:03:26.232620269Z","published_at":"2026-07-17T00:16:25.810Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-54340","https://security-tracker.debian.org/tracker/CVE-2026-54340"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-54340","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-54340"}],"summary":"h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 9265bdd, there is an HTTP/2 state amplification issue that combines HPACK decompression amplification with Slowloris"}