{"id":"CVE-2026-115482","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.","modified":"2026-10-23T02:45:53.840144448Z","published":"2026-10-22T15:07:30.961Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115482.json","cna_assigner":"mitre","cwe_ids":["CWE-770"]},"references":[{"type":"ARTICLE","url":"https://foxio.io/blog/header-accordions-qpack-amplification-attacks-against-http-3-servers"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115482.json"},{"type":"WEB","url":"https://github.com/litespeedtech/lsquic/compare/v4.8.2...v4.9.0"},{"type":"FIX","url":"https://github.com/litespeedtech/lsquic/pull/666"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-115482"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/litespeedtech/lsquic","events":[{"introduced":"0"},{"fixed":"8f3a7cbccdf6b908844cff49bd9f9fe57a466e36"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"0"},{"fixed":"4.9.0"}],"source":"AFFECTED_FIELD"}]}}],"versions":["v4.6.0","v4.8.2","v4.8.1","v4.8.0","v4.7.2","v4.7.1","v4.7.0","v4.6.4","v4.6.3","v4.6.2","v4.6.1","v4.5.0","v4.4.2","v4.4.1","v4.4.0","v4.3.2","v4.3.1","v4.3.0","v4.2.0","v4.1.0","v4.0.12","v4.0.11","v4.0.9","v4.0.8","v4.0.7","v4.0.6","v4.0.5","v4.0.4","v4.0.3","v4.0.2","v3.3.1","v4.0.1","v4.0.0","v3.3.0","v3.2.0","v3.1.3","v3.1.2","v3.1.1","v3.1.0","v3.0.4","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v2.30.2","v2.30.1","v2.30.0","v2.29.6","v2.29.5","v2.29.4","v2.29.3","v2.27.6","v2.29.2","v2.29.1","v2.29.0","v2.28.0","v2.27.5","v2.27.4","v2.27.3","v2.27.2","v2.27.1","v2.24.5","v2.27.0","v2.26.2","v2.26.1","v2.26.0","v2.25.0","v2.24.4","v2.24.3","v2.24.2","v2.24.1","v2.24.0","v2.23.3","v2.23.2","v2.23.1","v2.22.1","v2.22.0","v2.21.0","v2.20.2","v.2.20.1","v2.20.0","v2.19.10","v2.19.8","v2.19.7","v2.19.6","v2.19.5","v2.19.4","v2.19.3","v2.19.2","v2.19.1","v2.19.0","v2.18.2","v2.18.1","v2.18.0","v2.17.2","v2.17.1","v2.17.0","v2.16.3","v2.16.2","v2.16.1","v2.16.0","v.2.12.4","v2.15.0","v2.14.8","v2.14.7","v2.14.6","v2.14.5","v2.14.4","v2.14.3","v2.14.2","v2.14.1","v2.14.0","v2.13.3","v2.12.0","v2.13.2","v2.13.1","v2.13.0","v2.11.1","v2.10.6","v2.10.5","v2.10.4","v2.10.3","v2.10.1","v2.10.0","v2.9.0","v2.8.9","v2.8.8","v2.8.7","v2.8.5","v2.8.3","v2.8.2","v2.8.1","v2.8.0","v2.7.3","v2.7.2","v2.7.1","v2.7.0","v2.6.7","v2.6.6","v2.6.5","v2.6.3","v2.6.2","v2.6.1","v2.6.0","v2.5.2","v2.5.1","v2.5.0","v2.4.10","v2.4.8","v2.4.7","v2.4.6","v2.4.4","v2.4.3","v2.4.2","v2.4.1","v2.4.0","v2.3.1","v2.3.0","v2.2.0","1.21.2","1.21.1","1.20.0","1.19.6","1.19.5","1.19.4","1.19.2","1.19.1","1.18.0","1.17.15","1.17.14","1.17.12","1.17.11","1.17.10","1.17.9","1.17.8","1.17.7","1.17.6","1.17.3","1.17.2","1.17.0","1.16.0","1.15.0","1.14.3","1.14.0","1.13.0","1.12.4","1.12.3","1.12.2","1.12.0","1.11.1","1.11.0","v1.10.2","v1.10.1","v1.10","v1.2","v1.1","v1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115482.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}