CVE-2020-1911
Last modified
CVE-2020-1911 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 2.00% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hermes | < 0.4.3 |
References
- https://github.com/facebook/hermes/commit/fe52854cdf6725c2eaa9e125995da76e6ceb27daPatch, Third Party Advisory
- https://www.facebook.com/security/advisories/cve-2020-1911Third Party Advisory
- https://github.com/facebook/hermes/commit/fe52854cdf6725c2eaa9e125995da76e6ceb27daPatch, Third Party Advisory
- https://www.facebook.com/security/advisories/cve-2020-1911Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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