{"schema":"threatline.record/2","record":{"id":"CVE-2026-117610","aliases":[],"summary":"libexpat through 2.9.0 NULL Pointer Dereference via External Entity Subparser","details":"libexpat through 2.9.0 contains a NULL pointer dereference vulnerability in externalEntityInitProcessor2() in lib/xmlparse.c that mishandles the XML_TOK_NONE token from empty input. Attackers who control stream chunking can force an empty non-final first parse on an external entity subparser, causing a later parse to crash the application.","categories":["Libraries & packages"],"product":"libexpat","vendor":"libexpat","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-117610","source_modified_at":"2026-10-28T02:03:18.766Z","fetched_at":"2026-10-28T08:18:35.509402Z","product":"libexpat","vendor":"libexpat","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"2.9.0"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.2,"severity":"High","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-28T02:03:18.766Z","modified_at":"2026-10-28T02:03:18.766Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-117610","fetched_at":"2026-10-28T08:18:35.509402Z","source_modified_at":"2026-10-28T02:03:18.766Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/libexpat/libexpat/pull/1444","tags":["patch","issue-tracking"]},{"source":"CVE List","url":"https://github.com/libexpat/libexpat/commit/7b0d50e4b1d16fafd55876260701e04279a7489d","tags":["patch"]},{"source":"CVE List","url":"https://github.com/libexpat/libexpat/blob/a76b1174c1ea52abb639a4c69d52b630a8a106a2/expat/lib/xmlparse.c#L3468-L3510","tags":["technical-description"]},{"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-null-pointer-dereference-via-external-entity-subparser","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-28T02:03:18.766Z","content_hash":"977c0c74f1ccb87f111cfed8d7335a436feb440a1be9a2cbfd91de11c973e7b0"}}