A use after free in hermes, while emitting certain error messages, prior to commit d86e185e485b6330216dee8e854455c694e3a36e allows attackers to potentially execute arbitrary code 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 0.8.0)

Related CVEs

CVE-2021-24037

Key Information

GHSA ID

GHSA-mph8-6787-r8hw

Published

May 24, 2022 7:05 PM

Last Modified

June 22, 2022 6:20 PM

CVSS Score

9.0 /10

Primary Ecosystem

npm

Primary Package

hermes-engine

GitHub Reviewed

✓ Yes

Dataset

Last updated: July 3, 2025 6:26 AM

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