Researchers expose a flaw in at least three major crypto wallets, Ledger Live, Edge, and Breadwallet, which could be exploited for double spending users' funds
A standard way to transact Bitcoin could be vulnerable to double-spending, new research has found.
Context & Ripple Effects
This disclosure extends a familiar arc in which Bitcoin's security failures surface at the software layer rather than the protocol. In 2018 alone, Electrum carried a critical flaw for two years that went unpatched for weeks after discovery, while a teenager broke the 'tamper-proof' claims around Ledger's hardware wallets sold by the millions. Five years later, researchers at Unciphered traced a BitcoinJS library flaw to pre-2016 wallets with up to $1B at risk.
What makes this report distinct is the target class: not one app but at least three major wallets — Ledger Live, Edge, and Breadwallet — all exposed through what the research describes as a standard way to transact Bitcoin, meaning the weakness may sit in shared practice rather than any single codebase.
First-order effects
- Users transacting through Ledger Live, Edge, or Breadwallet face direct double-spend risk on their bitcoin until the flaw is patched, and each vendor must ship fixes and disclose whether exploitation occurred.
- Ledger's exposure is compounded by its history: the company whose hardware was marketed as tamper-resistant now has its companion software implicated in a second major vulnerability class.
Second-order effects
- Wallet developers across the market are forced to audit their own implementations of the same standard transaction method, since a flaw this generic suggests other apps built on identical assumptions share it.
- Merchants and exchanges accepting bitcoin payments bear the cost side of double-spending, pushing them toward more confirmations or third-party risk scoring before honoring transactions — added friction that lands on everyday payment flows.
Third-order effects
- If the pattern holds — Electrum, Ledger hardware, BitcoinJS, now three wallets at once — the durable lesson is that Bitcoin's end-user security concentrates in wallet software that is often unmaintained or built on shared libraries, making the wallet the industry's recurring attack surface and a likely focus for future audits and regulatory scrutiny of custody practices.
The trend: Bitcoin's security failures keep migrating up the stack from protocol to wallet software, where shared code and slow patching turn individual bugs into industry-wide exposures.