CVE-2026-20639

HIGH | Platform: macOS | Changelog

CVE Details

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.

CVSS 3.1 Score

Metric	Value
Base Score	7.5 (HIGH)
Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`

Weakness

CWE-190

References

Apple Security Advisory
NVD Entry
https://support.apple.com/en-us/126348 (Release Notes, Vendor Advisory)
https://support.apple.com/en-us/126796 (Release Notes, Vendor Advisory)