CVE-2026-115482

{"id": "CVE-2026-115482", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-115482", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-22T18:34:24.530507Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "litespeedtech", "product": "lsquic", "versions": [{"status": "affected", "version": "0", "lessThan": "4.9.0", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-10-22T16:17:35.490", "references": [{"url": "https://foxio.io/blog/header-accordions-qpack-amplification-attacks-against-http-3-servers", "source": "cve@mitre.org"}, {"url": "https://github.com/litespeedtech/lsquic/compare/v4.8.2...v4.9.0", "source": "cve@mitre.org"}, {"url": "https://github.com/litespeedtech/lsquic/pull/666", "source": "cve@mitre.org"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "cve@mitre.org", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-10-22T19:17:48.100", "sourceIdentifier": "cve@mitre.org"}