CVE-2021-30502: Simple Glasgow Haskell Compiler Project Simple Glasgow Haskell Compiler

Critical severity, CVSS 9.8. EPSS: 2.9% chance of exploitation in the next 30 days.

The unofficial vscode-ghc-simple (aka Simple Glasgow Haskell Compiler) extension before 0.2.3 for Visual Studio Code allows remote code execution via a crafted workspace configuration with replCommand.

Affected products

• Simple Glasgow Haskell Compiler Project Simple Glasgow Haskell Compiler: before 0.2.3 (fixed in 0.2.3)

Published 2021-04-25. Last modified 2026-06-17.