Malicious Package Affecting winforms package, versions [1.0.14][1.0.13][1.0.11][1.0.9][1.0.6][1.0.1][1.0.4][1.0.39][1.0.31][1.0.41][1.0.7][1.0.32][1.0.19][3.56.6][1.0.42][1.0.26][1.0.10][1.0.36][1.0.40][1.0.21][1.0.12][1.0.35][1.0.27][1.0.28][1.0.22][1.0.8][3.56.7][1.0.18][1.0.16][1.0.2][1.0.44][1.0.5][1.0.20][1.0.24][1.0.15][1.0.34][1.0.30][1.0.38][1.0.33][1.0.3][1.0.29][1.0.37][1.0.25][1.0.43][1.0.17][1.0.23]
Threat Intelligence
Exploit Maturity
Snyk has reported that there have been attempts or successful attacks targeting this vulnerability.
Attacked
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Test your applications- Snyk IDSNYK-DOTNET-WINFORMS-18138089
- published22 Jul 2026
- disclosed20 Jul 2026
- creditUnknown
Introduced: 20 Jul 2026
New Malicious CVE NOT AVAILABLE CWE-506 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Avoid using all malicious instances of the Winforms package.
Overview
Winforms is a malicious package. This package contains malicious code, and its content was removed from the official package manager. While this package might be attempting to impersonate a valid organization, there is no connection between that organization and this package authorship.