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Vulnerability record · CVE-2021-3401 · published 4 February 2021

CVE-2021-3401: Bitcoin argument injection vulnerability

Bitcoin · Bitcoin

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."

9.8 CVSS 3.1 Critical EPSS 10% · top 4.4% CWE-88 · Argument injection
9.8CVSS 3.1 base score, v2 7.5
10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

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."

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://achow101.com/2021/02/0.18-uri-vuln Third Party Advisory
https://github.com/bitcoin/bitcoin/pull/16578 PatchThird Party Advisory
https://achow101.com/2021/02/0.18-uri-vuln Third Party Advisory
https://github.com/bitcoin/bitcoin/pull/16578 PatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-3401), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.