A build error present in COLDCARD firmware for more than five years made seeds generated on affected devices predictable, enabling attackers with no access to the hardware to reconstruct private keys offline and sweep the matching addresses.
https://www.nobsbitcoin.com/coldcard-disaster-weak-entropy-bug-enables-drain-of-funds-from-cold-storage-wallets/
No Bullshit Bitcoin
npub1hx…qagw3
2026-08-03 20:50:56 UTC
Author Public Key
npub1hxjnw53mhghumt590kgd3fmqme8jzwwflyxesmm50nnapmqdzu7swqagw3Seen on
wss://relay.damus.ioPublished at
2026-08-03 20:50:56 UTCEvent JSON
{
"id": "5efbaab367da151eecb3d671e455a93d1b2ec1c9d7583e435e89069f44986f9a",
"pubkey": "b9a537523bba2fcdae857d90d8a760de4f2139c9f90d986f747ce7d0ec0d173d",
"created_at": 1785790256,
"kind": 1,
"tags": [
[
"r",
"wss://relay.primal.net/",
"write"
],
[
"r",
"wss://nostr.wine/"
],
[
"r",
"wss://wot.utxo.one/",
"read"
],
[
"client",
"Primal Web"
]
],
"content": "A build error present in COLDCARD firmware for more than five years made seeds generated on affected devices predictable, enabling attackers with no access to the hardware to reconstruct private keys offline and sweep the matching addresses.\n\nhttps://www.nobsbitcoin.com/coldcard-disaster-weak-entropy-bug-enables-drain-of-funds-from-cold-storage-wallets/",
"sig": "e4510a712ccff74b2a7b523bc947b8f03e14c6b9ee6b9fa37c3ecd445dabde20536b12510db125b6e4651341234230474a4da2585697af74b86df2519742c46b"
}