{"id":"CVE-2026-115482","published":"2026-10-22T16:17:35.490","lastModified":"2026-10-22T19:17:48.100","description":"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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-770"],"vendors":[],"products":[],"references":[{"url":"https://foxio.io/blog/header-accordions-qpack-amplification-attacks-against-http-3-servers","tags":[]},{"url":"https://github.com/litespeedtech/lsquic/compare/v4.8.2...v4.9.0","tags":[]},{"url":"https://github.com/litespeedtech/lsquic/pull/666","tags":[]}],"exploitRefs":[{"url":"https://github.com/litespeedtech/lsquic/compare/v4.8.2...v4.9.0","tags":[]},{"url":"https://github.com/litespeedtech/lsquic/pull/666","tags":[]}],"hasPoc":true,"ai":null}