CVE-2026-20639

published 2026-03-25

CVE-2026-20639: 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…

Priority P3 41 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C N I N A H

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

7 ranges

Vendor	Product	Version range	Fixed in
apple	macos	< 14.8.5	14.8.5
apple	macos	< 15.7.5	15.7.5
apple	macos	< 26.3	26.3
apple	macos	>= 14.0 < 14.8.5	14.8.5
apple	macos	>= 15.0 < 15.7.5	15.7.5
apple	macos	>= 26.0 < 26.3	26.3
apple	macos_tahoe	—	—

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-190