CVE-2020-1914
Last modified
CVE-2020-1914 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 2.41% chance of exploitation in the next 30 days.
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.
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 | < 2020-10-01 |
References
- https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfcPatch, Third Party Advisory
- https://www.facebook.com/security/advisories/cve-2020-1914Vendor Advisory
- https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfcPatch, Third Party Advisory
- https://www.facebook.com/security/advisories/cve-2020-1914Vendor 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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