CVE-2021-24045
Last modified
CVE-2021-24045 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A type confusion vulnerability could be triggered when resolving the "typeof" unary operator in Facebook Hermes prior to v0.10.0. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. EPSS estimates a 1.21% chance of exploitation in the next 30 days.
Description
A type confusion vulnerability could be triggered when resolving the "typeof" unary operator in Facebook Hermes prior to v0.10.0. 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 | < 0.10.0 |
References
- https://github.com/facebook/hermes/commit/55e1b2343f4deb1a1b5726cfe1e23b2068217ff2Patch, Third Party Advisory
- https://www.facebook.com/security/advisories/cve-2021-24045Vendor Advisory
- https://github.com/facebook/hermes/commit/55e1b2343f4deb1a1b5726cfe1e23b2068217ff2Patch, Third Party Advisory
- https://www.facebook.com/security/advisories/cve-2021-24045Vendor 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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