{"schema":"threatline.record/2","record":{"id":"CVE-2026-115482","aliases":[],"summary":"In lsquic before 4.9.0, the HTTP/3 implementation can use an excessive amount of memory because the number of buffered header sets is not limited, as demonstrated by a QPACK amplification attack. This","details":"In lsquic before 4.9.0, the HTTP/3 implementation can use an excessive amount of memory because the number of buffered header sets is not limited, as demonstrated by a QPACK amplification attack. This is related to header_out_dynamic_entry and es_max_header_list_size.","categories":["Unclassified"],"product":"lsquic","vendor":"litespeedtech","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115482","source_modified_at":"2026-10-22T19:00:31.416Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"lsquic","vendor":"litespeedtech","versions":[{"lessThan":"4.9.0","status":"affected","version":"0","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115482","source_modified_at":"2026-10-22T19:00:31.416Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"lsquic","ecosystem":null},"version":"4.9.0","basis":"first unaffected version stated in the CVE record"}],"cvss":7.5,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00446,"percentile":0.37791,"score_date":"2026-10-23"},"published_at":"2026-10-22T15:07:30.961Z","modified_at":"2026-10-22T19:00:31.416Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115482","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-22T19:00:31.416Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115482","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/litespeedtech/lsquic/pull/666"},{"source":"CVE List","url":"https://github.com/litespeedtech/lsquic/compare/v4.8.2...v4.9.0"},{"source":"CVE List","url":"https://foxio.io/blog/header-accordions-qpack-amplification-attacks-against-http-3-servers"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-22T18:34:24.530507Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-22T19:00:31.416Z","content_hash":"616f06b1f289cb91216939671ede2f035734b8787fe279c8691d8c0f884dd569"}}