CVE-2020-1914
Always-Incorrect Control Flow Implementation in Facebook Hermes
9.8
CRITICAL
CVSS 3.1
EPSS 1.4%
Description
A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook Hermes prior to commit b2021df620824627f5a8c96615edbd1eb7fdddfc allows attackers to potentially read out of bounds or theoretically 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.
How to fix CVE-2020-1914
To remediate CVE-2020-1914, upgrade the affected package to a fixed version below.
- —upgrade to 0.7.2 or later
Is CVE-2020-1914 being exploited?
Low — EPSS is 1.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.7.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |