CVE-2023-23557

Published: May 18, 2023Modified: Jun 17, 2026

9.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 5.9

Source: NVD

Description

An error in Hermes' algorithm for copying objects properties prior to commit a00d237346894c6067a594983be6634f4168c9ad could be used by a malicious attacker to execute arbitrary code via type confusion. Note that this is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.

Affected (1)

Products: Facebook: Hermes

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Facebook Hermes	Before 2023-01-10

Related CWEs

Access of Resource Using Incompatible Type ('Type Confusion')

The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

References (4)

https://github.com/facebook/hermes/commit/a00d237346894c6067a594983be6634f4168c9ad

Source: cve-assign@fb.com

PatchVendor Advisory

https://www.facebook.com/security/advisories/cve-2023-23557

Source: cve-assign@fb.com

PatchVendor Advisory

https://github.com/facebook/hermes/commit/a00d237346894c6067a594983be6634f4168c9ad

Source: af854a3a-2127-422b-91ae-364da2661108

PatchVendor Advisory

https://www.facebook.com/security/advisories/cve-2023-23557

Source: af854a3a-2127-422b-91ae-364da2661108

PatchVendor Advisory

Timeline

No history available yet.