CVE-2026-20639

Published: Mar 25, 2026Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

An integer overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. Processing a maliciously crafted string may lead to heap corruption.

Affected (3)

Products: Apple: Macos

Apple

1 product

Macos

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Apple Macos	From 14.0 to 14.8.5
Apple Macos	From 15.0 to 15.7.5
Apple Macos	From 26.0 to 26.3

Related CWEs

CWE-190

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (3)

https://support.apple.com/en-us/126348

Source: product-security@apple.com

Release NotesVendor Advisory

https://support.apple.com/en-us/126795

Source: product-security@apple.com

Release NotesVendor Advisory

https://support.apple.com/en-us/126796

Source: product-security@apple.com

Release NotesVendor Advisory

Timeline

No history available yet.