bitcoinjs-lib: Undetected merkle node duplication in block root computation validates a forged transaction list
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| bitcoinjs | bitcoinjs-lib | affected |
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| Source | ID | Title |
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Github GHSA |
GHSA-8vv3-6qpc-gpw6 | bitcoinjs-lib: Undetected merkle node duplication in block root computation validates a forged transaction list |
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.180% probability within 30 days)
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ssvc
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Bitcoinjs
Bitcoinjs bitcoinjs-lib |
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Bitcoinjs
Bitcoinjs bitcoinjs-lib |
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| Description | 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. | |
| Title | bitcoinjs-lib: Undetected merkle node duplication in block root computation validates a forged transaction list | |
| Weaknesses | CWE-354 | |
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| Metrics |
cvssV4_0
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