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CVE-2026-107846 (GCVE-0-2026-107846)

Vulnerability from cvelistv5 – Published: 2026-11-04 19:02 – Updated: 2026-11-09 16:50

Title

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

Summary

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 retains the original Merkle root, block header, proof of work, and block identifier. Consumers that rely on block-root validation, including explorers, exchange indexers, or SPV clients, can process a duplicated transaction twice or blacklist the shared block hash and reject the honest block. This issue is fixed in versions 5.2.1, 6.1.8, and 7.0.2.

Severity

9.3 (Critical)


                        
                          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

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-09 16:49 UTC

CWE

CWE-354 - Improper Validation of Integrity Check Value

Assigner

GitHub_M CNA

References

4 references

URL	Tags
https://github.com/bitcoinjs/bitcoinjs-lib/securi…	x_refsource_CONFIRM
https://github.com/bitcoinjs/bitcoinjs-lib/commit…	x_refsource_MISC
https://github.com/bitcoinjs/bitcoinjs-lib/commit…	x_refsource_MISC
https://github.com/bitcoinjs/bitcoinjs-lib/commit…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
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

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-107846",
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CVE-2024-49364 (GCVE-0-2024-49364)

Vulnerability from cvelistv5 – Published: 2025-07-01 02:07 – Updated: 2025-07-01 13:16

Title

tiny-secp256k1 vulnerable to private key extraction when signing a malicious JSON-stringifyable message in bundled environment

Summary

tiny-secp256k1 is a tiny secp256k1 native/JS wrapper. Prior to version 1.1.7, a private key can be extracted on signing a malicious JSON-stringifiable object, when global Buffer is the buffer package. This affects only environments where require('buffer') is the NPM buffer package. The Buffer.isBuffer check can be bypassed, resulting in k reuse for different messages, leading to private key extraction over a single invalid message (and a second one for which any message/signature could be taken, e.g. previously known valid one). This issue has been patched in version 1.1.7.

Severity

8.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-07-01 13:16 UTC

CWE

CWE-522 - Insufficiently Protected Credentials

Assigner

GitHub_M CNA

References

2 references

URL	Tags
https://github.com/bitcoinjs/tiny-secp256k1/secur…	x_refsource_CONFIRM
https://github.com/bitcoinjs/tiny-secp256k1/pull/140	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
bitcoinjs	tiny-secp256k1	Affected: < 1.1.7

Show details on NVD website

JSON

To clipboard

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CVE-2024-49365 (GCVE-0-2024-49365)

Vulnerability from cvelistv5 – Published: 2025-07-01 02:07 – Updated: 2025-07-01 13:18

Title

tiny-secp256k1 allows for verify() bypass when running in bundled environment

Summary

tiny-secp256k1 is a tiny secp256k1 native/JS wrapper. Prior to version 1.1.7, a malicious JSON-stringifyable message can be made passing on verify(), when global Buffer is the buffer package. This affects only environments where require('buffer') is the NPM buffer package. Buffer.isBuffer check can be bypassed, resulting in strange objects being accepted as a message, and those messages could trick verify() into returning false-positive true values. This issue has been patched in version 1.1.7.

Severity

8.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-07-01 13:18 UTC

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

GitHub_M CNA

References

2 references

URL	Tags
https://github.com/bitcoinjs/tiny-secp256k1/secur…	x_refsource_CONFIRM
https://github.com/bitcoinjs/tiny-secp256k1/pull/140	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
bitcoinjs	tiny-secp256k1	Affected: < 1.1.7

Show details on NVD website

JSON

To clipboard

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Find a vulnerability

Search criteria

3 vulnerabilities by bitcoinjs

CVE-2026-107846 (GCVE-0-2026-107846)

CVE-2024-49364 (GCVE-0-2024-49364)

CVE-2024-49365 (GCVE-0-2024-49365)