Out-of-bounds Read and Out-of-bounds Write in Facebook Hermes
An out-of-bounds read/write vulnerability when executing lazily compiled inner generator functions in Facebook Hermes prior to commit 091835377369c8fd5917d9b87acffa721ad2a168 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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | hermes-engine | < 0.5.2 | 0.5.2 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-125, CWE-787- Platform
- npm
- Package
hermes-engine- Disclosed
- 24.05.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-pf27-929j-9pmm - CC BY 4.0
Vulnerability history: hermes-engine
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 7
- First → latest
- 01.2022 05.2022
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 4
- High 3
Disclosures per year
- 2022: 7
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Out-of-bounds Read and Out-of-bounds Write in Facebook Hermes this entry
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