What’s Vulnerable › Vulnerabilities

CVE-2023-42866

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-10 · updated 2026-06-17

Description

The issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, tvOS 16.6, Safari 16.6, watchOS 9.6. Processing web content may lead to arbitrary code execution.

Affected products

• Apple iPadOS: before 16.6 — fixed in 16.6
• Apple Iphone Os: before 16.6 — fixed in 16.6
• Apple macOS: before 13.5 — fixed in 13.5
• Apple Safari: before 16.6 — fixed in 16.6
• Apple tvOS: before 16.6 — fixed in 16.6
• Apple watchOS: before 9.6 — fixed in 9.6

How to fix

Upgrade to a fixed version: Apple iPadOS 16.6; Apple Iphone Os 16.6; Apple macOS 13.5; Apple Safari 16.6; Apple tvOS 16.6; Apple watchOS 9.6. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT213841
• https://support.apple.com/en-us/HT213843
• https://support.apple.com/en-us/HT213846
• https://support.apple.com/en-us/HT213847
• https://support.apple.com/en-us/HT213848
• https://support.apple.com/en-us/HT213841
• https://support.apple.com/en-us/HT213843
• https://support.apple.com/en-us/HT213846
• https://support.apple.com/en-us/HT213847
• https://support.apple.com/en-us/HT213848

Get alerted when CVE-2023-42866 or the next vulnerability affects your stack