CVE-2026-39868

Description

This issue was addressed with improved input validation. This issue is fixed in iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. An app may be able to cause unexpected system termination or corrupt kernel memory.

CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS — Exploit Prediction

0.0037

Probability of exploitation

0.29%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
apple	ipados	< 26.5.2
apple	iphone_os	< 26.5.2
apple	macos	< 26.5.2

References

Advisories & Patches

https://support.apple.com/en-us/127594 https://support.apple.com/en-us/127595

Frequently Asked Questions

What is CVE-2026-39868? +

This issue was addressed with improved input validation. This issue is fixed in iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. An app may be able to cause unexpected system termination or corrupt kernel memory. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2026-39868? +

CVE-2026-39868 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0037, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-39868? +

CVE-2026-39868 affects products from apple, specifically: ipados, iphone_os, macos. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-39868? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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