CVE-2020-1911
Access of Resource Using Incompatible Type in Facebook Hermes
9.8
CRITICAL
CVSS 3.1
EPSS 1.0%
Description
A type confusion vulnerability when resolving properties of JavaScript objects with specially-crafted prototype chains in Facebook Hermes prior to commit fe52854cdf6725c2eaa9e125995da76e6ceb27da 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.
How to fix CVE-2020-1911
To remediate CVE-2020-1911, upgrade the affected package to a fixed version below.
- —upgrade to 0.5.2 or later
Is CVE-2020-1911 being exploited?
Low — EPSS is 1.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 0.5.2
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 |