What is GHSA-cg48-9hh2-x6mx?

GHSA-cg48-9hh2-x6mx is a security advisory published by GitHub Security Advisories with Medium severity. HTML Injection in preact

Why does GHSA-cg48-9hh2-x6mx have no CVE ID yet?

GitHub Security Advisories published this advisory directly to customers before NVD assigned a CVE ID. This is the embargo-window disclosure pattern — vendors notify customers on day 0; NVD's public record follows days to weeks later.

Which products are affected by GHSA-cg48-9hh2-x6mx?

GHSA-cg48-9hh2-x6mx affects 1 product, including: npm/preact:\u003e= 10.0.0-alpha.0, \u003c= 10.0.0-beta.0.

GHSA-cg48-9hh2-x6mxMediumDisclosed before NVD

HTML Injection in preact

Vendor

GitHub Security Advisories

Published

September 2, 2020

Last Modified

January 9, 2023

📋 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.

🎯 Affected products1

npm/preact:>= 10.0.0-alpha.0, <= 10.0.0-beta.0

🔗 References (5)

https://github.com/developit/preact/pull/1528
https://github.com/developit/preact/releases/tag/10.0.0-beta.1
https://medium.com/dailyjs/exploiting-script-injection-flaws-in-reactjs-883fb1fe36c1
https://www.npmjs.com/advisories/835
https://github.com/advisories/GHSA-cg48-9hh2-x6mx