CVE-2023-40397

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-09-06 · updated 2026-06-17

Description

The issue was addressed with improved checks. This issue is fixed in macOS Ventura 13.5. A remote attacker may be able to cause arbitrary javascript code execution.

Affected products

Apple macOS: before 13.5 — fixed in 13.5
Webkit: before 2.40.5 — fixed in 2.40.5
Wpewebkit Wpe Webkit: before 2.40.5 — fixed in 2.40.5

How to fix

Upgrade to a fixed version: Apple macOS 13.5; Webkit 2.40.5; Wpewebkit Wpe Webkit 2.40.5. Check the vendor advisory for mitigations.

References

http://www.openwall.com/lists/oss-security/2023/09/11/1
https://security.gentoo.org/glsa/202401-04
https://support.apple.com/en-us/HT213843
http://www.openwall.com/lists/oss-security/2023/09/11/1
https://security.gentoo.org/glsa/202401-04
https://support.apple.com/en-us/HT213843

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