docs: add Coldcard Mk3 seed-entropy security notice to plugin README - #10805
Merged
Conversation
Member
|
thanks. please remove unicode from your notice; we ban unicode from our codebase for security reasons |
SomberNight
reviewed
Aug 6, 2026
|
|
||
| ## ⚠ Security notice | ||
|
|
||
| Coinkite disclosed (July 2026) a firmware build error that reduced generated-seed entropy on **Coldcard Mk3** (firmware 4.0.1–5.0.3) and pre-fix **Mk4/Q**. Seeds generated on-device without extra dice rolls may be brute-forceable. Update to fixed firmware, generate a new seed and move your funds. See the [Coinkite advisory](https://blog.coinkite.com/coldcard-mk3-seed-generation-warning/). |
Member
There was a problem hiding this comment.
please remove unicode from your notice
(using unicode dashes vs ascii hyphen-minus)
Can't even be bothered to write a single line of text by hand anymore, huh?
Contributor
Author
There was a problem hiding this comment.
@SomberNight @ecdsa updated. Scanning and updating references to ColdCards in multiple repos is way more effective with LLMs. Why would I do that manually if it's slower and more error prone?
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Adds a short Security notice to the Coldcard plugin README (
electrum/plugins/coldcard/README.md).In July 2026 Coinkite disclosed a firmware build error that reduced generated-seed entropy on Coldcard Mk3 (firmware 4.0.1–5.0.3) and pre-fix Mk4/Q. Electrum doesn't generate the Coldcard seed, so this isn't an Electrum flaw — but users who set up a Coldcard via Electrum may hold funds on an affected seed. Docs-only change.
Refs #10804.