Morning Edition · Monday, October 5, 2026Published at 1:31 AM EDT · New York
The merged fix stops the wallet from signing a SIGHASH_SINGLE input that has no matching output, but no release has yet been confirmed to ship it.

Bitcoin Core developers merged a change on September 25. It stops the wallet from producing a type of signature that is not tied to the transaction it appears to approve, CryptoSlate reported. The fix is tracked in pull request 35984 and is…
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Part of a tracked trend
Implementation Bugs, Not Just Exploits, Threaten Custody
Cryptographic implementation errors in wallets and signers (biased nonces, reused randomness, faulty derivation) keep surfacing as a distinct custody risk alongside smart-contract exploits, eroding the assumption that certified hardware protects keys.
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