{"id":"EM-20261110-JXVF","url":"https://cyber.eventmonitor.net/incident/EM-20261110-JXVF/critical-bitcoinjs-lib-vulnerability-cve-2026-107846/","type":"cve","title":"Critical bitcoinjs-lib Vulnerability (CVE-2026-107846)","subtitle":"CVE-2026-107846","subject":"CVE-2026-107846","status":"Developing","severity":"critical","affected":[],"headline":null,"born":"2026-11-10T15:57:25.000Z","firstSignal":"2026-11-04T19:17:18.130Z","lastSignal":"2026-11-10T15:57:25.000Z","updated":"2026-11-10T16:07:51.148Z","revision":1,"life":[{"status":"Born","at":"2026-11-10T15:57:25.000Z","why":"second independent source: C26 GitHub Advisory Database"},{"status":"Developing","at":"2026-11-10T15:57:25.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-04T19:17:18.130Z","what":"First signal: C6 NVD CVE API 2.0"},{"at":"2026-11-10T15:57:25.000Z","what":"Born: second source, C26 GitHub Advisory Database. Page EM-20261110-JXVF created."}],"stages":[{"name":"Disclosed","at":"2026-11-04T19:17:18.130Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-04T19:17:18.130Z","detail":"CVSS 9.3 · EPSS 0.2%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":null,"detail":"None in sources yet"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-04T19:17:18.130Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":4,"title":"CVE-2026-107846 (CVSS 9.3)","text":"bitcoinjs-lib is a JavaScript Bitcoin library for Node.js and browsers. From 2.3.0 until 5.2.1, 6.1.8, and 7.0.2, fastMerkleRoot pads odd Merkle-tree levels by hashing the final node with itself but does not report adjacent duplicate hashes. The affected block-root verifier was introduced as Block.checkMerkleRoot() alongside Block.calculateMerkleRoot(), while later versions expose validation through checkTxRoots() and __checkMerkleRoot; these validation paths can accept a recomputed root without checking for mutation. A peer can append duplicate transactions so a different transaction list…","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107846"},{"at":"2026-11-10T15:57:25.000Z","source":"C26","sourceName":"GitHub Advisory Database","role":"Database","severity":4,"title":"GHSA-8vv3-6qpc-gpw6 / CVE-2026-107846: bitcoinjs-lib: Undetected merkle node duplication in block root computation validates a forged transaction list","text":"npm:bitcoinjs-lib, npm:bitcoinjs-lib, npm:bitcoinjs-lib","url":"https://github.com/advisories/GHSA-8vv3-6qpc-gpw6"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-04T19:17:18.130","score":9.3,"severity":"CRITICAL","desc":"bitcoinjs-lib is a JavaScript Bitcoin library for Node.js and browsers. From 2.3.0 until 5.2.1, 6.1.8, and 7.0.2, fastMerkleRoot pads odd Merkle-tree levels by hashing the final node with itself but does not report adjacent duplicate hashes. The affected block-root verifier was introduced as…","product":"","seen":1794252807959},"kev":null,"epss":{"epss":0.0018,"pct":0.07588,"at":1794326871148},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}