developit/preact · Security
HTML Injection in preact
- GHSA ID
- GHSA-cg48-9hh2-x6mx
- Severity
- medium
- Published
- Updated
Description
Versions of preact 10.x on prerelease tags alpha and beta prior to 10.0.0-beta.1 are vulnerable to HTML Injection. Due to insufficient input validation the package allows attackers to inject JavaScript objects as virtual-dom nodes, which may lead to Cross-Site Scripting. This requires user input parsed with JSON.parse() to be passed directly into JSX without sanitization.
Recommendation
Upgrade to version 10.0.0-beta.1.
CWEs
- CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')