CVE-2023-40451

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-09-27 · updated 2026-06-17

Description

This issue was addressed with improved iframe sandbox enforcement. This issue is fixed in Safari 17. An attacker with JavaScript execution may be able to execute arbitrary code.

Affected products

Apple Safari: before 17.0 — fixed in 17.0

How to fix

Upgrade to a fixed version: Apple Safari 17.0. Check the vendor advisory for mitigations.

References

http://seclists.org/fulldisclosure/2023/Oct/2
http://www.openwall.com/lists/oss-security/2023/09/28/3
https://security.gentoo.org/glsa/202401-33
https://support.apple.com/en-us/HT213941
http://seclists.org/fulldisclosure/2023/Oct/2
http://www.openwall.com/lists/oss-security/2023/09/28/3
https://security.gentoo.org/glsa/202401-33
https://support.apple.com/en-us/HT213941
https://webkitgtk.org/security/WSA-2023-0009.html

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