{"id":"CVE-2026-115506","revision":"d48277cfeeb141a4bb9bf27cf8618828","records":[{"revision":"d48277cfeeb141a4bb9bf27cf8618828","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-115506","aliases":[],"title":"libexpat through 2.9.0 Denial of Service via Billion Laughs Detection Delay","description":"libexpat through 2.9.0 contains a denial of service vulnerability because billion laughs protection in accountingDiffTolerated() in xmlparse.c detects entity amplification too late. Attackers can supply a moderately sized XML document with a large DTD and nested entity expansions to consume tens of seconds of CPU per parse.","state":0,"publishedAt":"2026-10-22T19:14:06.001+00:00","modifiedAt":"2026-10-22T19:14:06.001+00:00","affected":[{"ecosystem":"Vendor product","name":"libexpat","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"libexpat\",\n                    \"product\": \"libexpat\",\n                    \"packageURL\": \"pkg:github/libexpat/libexpat\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThanOrEqual\": \"2.9.0\"\n                        }\n                    ],\n                    \"repo\": \"https://github.com/libexpat/libexpat\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/libexpat/libexpat/pull/1433","https://github.com/libexpat/libexpat/issues/1160","https://github.com/hannob/lololol","https://github.com/libexpat/libexpat","https://www.vulncheck.com/advisories/libexpat-through-2.9.0-denial-of-service-via-billion-laughs-detection-delay"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115506","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-115506","identifiers":["CVE-2026-115506"]},"retained":false,"historicalAffected":[]}],"coverage":[]}