CVE-2026-32732CWE-80

XSS in @leanprover/unicode-input-component

published March 13, 2026

CVSS v4.0
0.0
EPSS
1%
Percentile
44.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
0.0 · NONE
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00541 · 44.7th percentile
Weakness
CWE-80 · Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Published
2026-03-13T21:43Z
EPSS history
Timeline
  • 13 MAR 21:43Z
    XSS in @leanprover/unicode-input-component
    cvelistv5