{"schema":"threatline.record/2","record":{"id":"CVE-2026-115506","aliases":[],"summary":"libexpat through 2.9.0 Denial of Service via Billion Laughs Detection Delay","details":"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.","categories":["Libraries & packages"],"product":"libexpat","vendor":"libexpat","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115506","source_modified_at":"2026-10-23T21:06:43.010Z","fetched_at":"2026-10-23T21:10:45.942435Z","product":"libexpat","vendor":"libexpat","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"2.9.0"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.0035,"percentile":0.27483,"score_date":"2026-10-23"},"published_at":"2026-10-22T19:14:06.001Z","modified_at":"2026-10-23T21:06:43.010Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115506","fetched_at":"2026-10-23T21:10:45.942435Z","source_modified_at":"2026-10-23T21:06:43.010Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115506","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/libexpat/libexpat/pull/1433","tags":["patch","issue-tracking"]},{"source":"CVE List","url":"https://github.com/libexpat/libexpat/issues/1160","tags":["issue-tracking"]},{"source":"CVE List","url":"https://github.com/hannob/lololol","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/libexpat/libexpat","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/libexpat-through-2.9.0-denial-of-service-via-billion-laughs-detection-delay","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-23T18:03:08.684378Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-23T21:06:43.010Z","content_hash":"d5b5992a3c1d33da202d0837e8796d1903e90fb7153203ac19ad406cceede1ad"}}