CVE-2024-40866

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-09-17 · updated 2026-06-17

Description

The issue was addressed with improved UI. This issue is fixed in Safari 18, macOS Sequoia 15. Visiting a malicious website may lead to address bar spoofing.

Affected products

Apple macOS: before 15.0 — fixed in 15.0
Apple Safari: before 18.0 — fixed in 18.0

How to fix

Upgrade to a fixed version: Apple macOS 15.0; Apple Safari 18.0. Check the vendor advisory for mitigations.

References

https://support.apple.com/en-us/121238
https://support.apple.com/en-us/121241
http://seclists.org/fulldisclosure/2024/Sep/33
http://seclists.org/fulldisclosure/2024/Sep/37
https://lists.debian.org/debian-lts-announce/2024/11/msg00019.html

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