CVE-2021-24045
mediumpriority · track · 39EPSS 0.013 · 69 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 6.8–9.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://github.com/facebook/hermes/commit/55e1b2343f4deb1a1b5726cfe1e23b2068217ff2cnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-24045cnnvd
- https://www.facebook.com/security/advisories/cve-2021-24045cnnvd
- https://github.com/facebook/hermes/commit/55e1b2343f4deb1a1b5726cfe1e23b2068217ff2enisa_euvd
- https://www.facebook.com/security/advisories/cve-2021-24045enisa_euvd
- https://github.com/facebook/hermes/commit/55e1b2343f4deb1a1b5726cfe1e23b2068217ff2PatchThird Party Advisorynvd
- https://www.facebook.com/security/advisories/cve-2021-24045Vendor Advisorynvd
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