🛡️ CVE-2023-23557
🔴 CVSS 9.8 — Critical ✅ No Known Exploit CWE-843 NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity CRITICAL
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-843
Public Exploit ✅ No
Source NVD
Published 2023-05-18
Updated 2026-06-08
Modified 2025-01-21

Affected Packages

Software From version Fixed in
hermes 2023-01-10

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