CVE-2021-3401: Bitcoin

Critical severity, CVSS 9.8. EPSS: 10.5% chance of exploitation in the next 30 days.

Bitcoin Core before 0.19.0 might allow remote attackers to execute arbitrary code when another application unsafely passes the -platformpluginpath argument to the bitcoin-qt program, as demonstrated by an x-scheme-handler/bitcoin handler for a .desktop file or a web browser. NOTE: the discoverer states "I believe that this vulnerability cannot actually be exploited."

Affected products

• Bitcoin Bitcoin: before 0.19.0 (fixed in 0.19.0)

Published 2021-02-04. Last modified 2026-06-17.