{"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_01M5NS7X1WN76RP3NYF7QBDMNX","modified_at":"2026-10-01T03:03:13.614020979Z","published_at":"2026-07-16T23:16:17.280Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2026-44452","https://security-tracker.debian.org/tracker/CVE-2026-44452"],"severity":{"label":"medium","score":5.9},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2026-44452","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2026-44452"}],"summary":"h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 8dc37cb, when h2o receives a ClientHello message over TLS or QUIC and it contains a zero-length SNI extension, the h"}