{"id":"EM-20261110-87IU","url":"https://cyber.eventmonitor.net/incident/EM-20261110-87IU/fast-xml-parser-vulnerability-cve-2026-126066/","type":"cve","title":"fast-xml-parser Vulnerability (CVE-2026-126066)","subtitle":"CVE-2026-126066","subject":"CVE-2026-126066","status":"Developing","severity":"info","affected":[],"headline":null,"born":"2026-11-10T21:09:44.000Z","firstSignal":"2026-11-10T20:23:16.000Z","lastSignal":"2026-11-10T21:09:44.000Z","updated":"2026-11-11T12:38:43.721Z","revision":1,"life":[{"status":"Born","at":"2026-11-10T21:09:44.000Z","why":"second independent source: C26 GitHub Advisory Database"},{"status":"Developing","at":"2026-11-10T21:09:44.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-10T20:23:16.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-10T21:09:44.000Z","what":"Born: second source, C26 GitHub Advisory Database. Page EM-20261110-87IU created."}],"stages":[{"name":"Disclosed","at":"2026-11-10T21:19:24.487Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-10T21:19:24.487Z","detail":"CVSS 3.7"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-10T20:23:16.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-10T20:23:16.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":1,"title":"Red Hat: CVE-2026-126066 (low)","text":"fast-xml-parser: fast-xml-parser: Denial of Service via quadratic rescanning of unterminated tags","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-126066.json"},{"at":"2026-11-10T21:09:44.000Z","source":"C26","sourceName":"GitHub Advisory Database","role":"Database","severity":1,"title":"GHSA-474x-hrwr-fgx4 / CVE-2026-126066: fast-xml-parser: Quadratic CPU consumption scanning unterminated stop-node tags","text":"npm:fast-xml-parser","url":"https://github.com/advisories/GHSA-474x-hrwr-fgx4"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-10T21:19:24.487","score":3.7,"severity":"LOW","desc":"fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. Prior to 5.12.0, when the non-default stopNodes option is enabled, readStopNodeData() in OrderedObjParser.js calls readTagExp() for each less-than character in an unterminated stop-node body and…","product":"","seen":1794353084878},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}