An Integer signedness error in the JavaScript Interpreter in Facebook Hermes prior to commit 2c7af7ec481ceffd0d14ce2d7c045e475fd71dc6 allows attackers to cause a denial of service attack or a potential RCE via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

Affected Packages

npm hermes-engine

Affected versions: 0 (fixed in 0.5.2)

Related CVEs

CVE-2020-1913

Key Information

GHSA ID

GHSA-gmpm-xp43-f7g6

Published

May 24, 2022 5:27 PM

Last Modified

June 24, 2022 1:23 AM

CVSS Score

7.5 /10

Primary Ecosystem

npm

Primary Package

hermes-engine

GitHub Reviewed

✓ Yes

Dataset

Last updated: September 12, 2025 6:34 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.