TI-2021-06360 Aliases CVE-2021-24045 GHSA-7493-f24p-jv53

Type confusion in Meta Hermes

MEDIUM 45CWE-843Published 2021-12-13 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-843 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.01252 69th percentileScored 2026-11-07

Fix Fixed Hermes (Facebook): 0.10.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Meta	Hermes	before 0.10.0	0.10.0	Patch available	CNA

Hermes VendorMeta Affected before 0.10.0 Fixed in 0.10.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:facebook:hermes::::::::	before 0.10.0	Vulnerable	Meta

cpe:2.3:a:facebook:hermes:*:*:*:*:*:*:*:* Versions before 0.10.0 Vulnerable ·Meta

Remediation

Fix · CNA Hermes (Facebook) Fixed in 0.10.0

Timeline

2026-10-02 Threatist record created from CVE-2021-24045
2026-10-03 Alias added: GHSA-7493-f24p-jv53

References

Patch 1

https://github.com/facebook/hermes/commit/55e1b2343f4deb1a1b5726cfe1e23b2068217ff2

Advisory 1

https://www.facebook.com/security/advisories/cve-2021-24045

TI-2023-14306 Use after free in Meta Hermes CVSS 3.1CRITICAL 9.8
TI-2023-12661 Use after free in Meta Hermes CVSS 3.1CRITICAL 9.8
TI-2023-11181 Type confusion in Meta Hermes CVSS 3.1CRITICAL 9.8
TI-2023-09388 Type confusion in Meta Hermes CVSS 3.1CRITICAL 9.8
TI-2023-09387 Out-of-bounds write in Meta Hermes CVSS 3.1CRITICAL 9.8
TI-2020-01841 A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook Hermes… CVSS 3.1CRITICAL 9.8

See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences