If you generated the seed using an Mk3 on version 4.0.1 (March 2021) or any subsequent version URGENT ACTION IS REQUIRED!
Seeds generated on Mk4, Q and Mk5 before the fixed firmware releases are also affected. UPDATE AND SEED REGENERATION IS REQUIRED!
https://coldcard.com/docs/upgrade/
ColdHodl
npub17f…3pf7l
2026-07-31 08:58:26 UTC
Author Public Key
npub17fhtaz3jkaa9jjg3tkqg7xes6cqhwa7vdwevknzeak686zkyrjpqj3pf7lPublished at
2026-07-31 08:58:26 UTCEvent JSON
{
"id": "46a7f26b9ae4e2ece2296bec09ac15de558857912d2877d51a08724d81972ba5",
"pubkey": "f26ebe8a32b77a5949115d808f1b30d6017777cc6bb2cb4c59edb47d0ac41c82",
"created_at": 1785488306,
"kind": 1,
"tags": [
[
"r",
"wss://nos.lol/"
],
[
"r",
"wss://relay.primal.net/"
],
[
"r",
"wss://nostr.bitcoiner.social/"
],
[
"r",
"wss://purplepag.es/"
],
[
"r",
"wss://relay.damus.io/"
],
[
"client",
"Primal Web"
]
],
"content": "If you generated the seed using an Mk3 on version 4.0.1 (March 2021) or any subsequent version URGENT ACTION IS REQUIRED!\n\nSeeds generated on Mk4, Q and Mk5 before the fixed firmware releases are also affected. UPDATE AND SEED REGENERATION IS REQUIRED!\n\nhttps://coldcard.com/docs/upgrade/",
"sig": "512ee1cb0dd05d0d13fb191ef21ea353586d9cfde4d90e724b18da431b14ecb2ab947c9d2df00e3cff577d36a5c339eea6e4172be5587220b748451df2205807"
}