Bug in #Segwit, which can be a security vulnerability for hardware wallets and similar.
#Bitcoin isn't vulnerable itself, but users of Segwit wallets should ensure they upgrade if affected, before *sending* any new transactions.
(The solution is to not use a new technical-internals feature Segwit introduced.)
@kekcoin It shouldn't affect the built-in wallet.
I'm not 100% clear on if it affects the PSBT RPCs, or not.
@lukedashjr It may have been addressed by Ledger in a recent update -- https://www.reddit.com/r/ledgerwallet/comments/gwzyln/segwit_vulnerability_hardware_wallets_concerns/
@lukedashjr Here's the update posted by Ledger themselves -- https://support.ledger.com/hc/en-us/articles/360014191540-Massive-transaction-fees-in-BTC-and-BTC-based-apps
Bitcoin Maston Instance