An out-of-bounds read in the JavaScript Interpreter in Facebook Hermes prior to commit 8cb935cd3b2321c46aa6b7ed8454d95c75a7fca0 allows attackers to cause a denial of service attack or possible further memory corruption 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 0.7.2)

Related CVEs

CVE-2020-1915

Key Information

GHSA ID

GHSA-x4cf-6jr3-3qvp

Published

May 24, 2022 5:32 PM

Last Modified

June 27, 2022 5:02 PM

CVSS Score

7.5 /10

Primary Ecosystem

npm

Primary Package

hermes-engine

GitHub Reviewed

✓ Yes

Dataset

Last updated: September 10, 2025 6:31 AM

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