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CVE record · CVE-2026-107846

bitcoinjs-lib: Undetected merkle node duplication in block root computation validates a forged transaction list

CVSS 9.3 CriticalCriticalEPSS 0.0018 · 7th percentile

Critical, because:

  • CVSS score 9.3: 9.0 or more.

How we decide what’s critical

Published by the CVE Program (CNA: GitHub_M) at 4 Nov 2026, 19:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
bitcoinjs bitcoinjs-lib
  • affected >= 2.3.0, < 5.2.1
  • affected >= 6.0.0, < 6.1.8
  • affected >= 7.0.0-rc.0, < 7.0.2
Identifiers
CVE-2026-107846
CNA
GitHub_M
Weakness (CWE)
CWE-354
Tags
Published
4 Nov 2026
Updated
4 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.3 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:H/SA:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0018, the 7th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 4 Nov 2026, 19:02 UTC Confirmed by the CVE List
  2. 4 Nov 2026, 19:17 UTC Confirmed by NVD
  3. 4 Nov 2026, 19:17 UTC First seen by agentprime

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.