What’s Vulnerable › Vulnerabilities

CVE-2026-39877

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-27 · updated 2026-10-24
• Weakness: CWE-119

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An app may be able to disclose kernel memory.

Affected products

• Apple macOS: from 14.0 before 14.8.8; from 15.0 before 15.7.8 — fixed in 14.8.8, 15.7.8

How to fix

Upgrade to a fixed version: Apple macOS 14.8.8, 15.7.8. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/127110
• https://support.apple.com/en-us/127115
• https://support.apple.com/en-us/127118
• https://support.apple.com/en-us/127119
• https://support.apple.com/en-us/127120
• https://support.apple.com/en-us/128071
• https://support.apple.com/en-us/128072
• https://support.apple.com/en-us/148287

Get alerted when CVE-2026-39877 or the next vulnerability affects your stack