CVE-2026-32732: Leanprover Vscode-LEAN4

None severity, CVSS 0.0. EPSS: 0.5% chance of exploitation in the next 30 days.

Lean 4 VS Code Extension is a Visual Studio Code extension for the Lean 4 proof assistant. Projects that use @leanprover/unicode-input-component are vulnerable to an XSS exploit in 0.1.9 of the package and lower. The component re-inserted text in the input element back into the input element as unescaped HTML. The issue has been resolved in 0.2.0.

Affected products

• Leanprover Vscode-LEAN4: before 0.2.0 (fixed in 0.2.0)

Published 2026-03-16. Last modified 2026-06-17.