COLDCARD vulnerability what happened, and what to do
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Independent hardware reproduction

instagibbs-reproduction

https://x.com/theinstagibbs/status/2082958675975553224

Author
@theinstagibbs
Organisation
independent
Evidence role
independent-reproduction
Posted
30 Jul 2026, 22:37 UTC
Capture status
capture held
Artefacts held
4

Gregory Sanders's concise public result from an independent hardware reproduction: Mk2/Mk3 confirmed, with Mk4 explicitly left uncertain. The owned device inputs and unpublished scripts limit what this establishes about a blind remote search.

This post is registered as evidence and has locally held capture artefacts. The original remains the canonical publication; hashes below identify the files held by this project.

How to check this yourself

The SHA-256 prefixes above identify each held copy without turning this page into a mirror of somebody else's post. Compare a quotation against the original. If the post has since been edited or deleted, ask and the held copy can be produced.