{"action":"Upgrade ngtcp2 to 1.9.1-r1 or later.","affected":[{"fixed":"1.9.1-r1","introduced":"0"}],"component":"ngtcp2","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.21","exploited":false,"fixed_versions":["1.9.1-r1"],"id":"tcs_01M5NFQ3N88WS8MJKP0179NN51","modified_at":"2026-10-01T02:17:49.274915200Z","published_at":"2026-04-16T22:16:38.220Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2026-40170","https://security.alpinelinux.org/vuln/CVE-2026-40170"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2026-40170#Alpine:v3.21/ngtcp2","url":"https://osv.dev/vulnerability/ALPINE-CVE-2026-40170"}],"summary":"ngtcp2 is a C implementation of the IETF QUIC protocol. In versions prior to 1.22.1, ngtcp2_qlog_parameters_set_transport_params() serializes peer transport parameters into a fixed 1024-byte stack buf"}