CVE-2026-20602

WindowServer: An app may be able to cause a denial-of-service

CVE-2026-20602 is fixed in 3 products on 1 platform, first by Sequoia 15.7.4, released February 11, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.5

MEDIUM

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0016

5th percentile

The issue was addressed with improved handling of caches.

Where it's fixed

Product	Fixed in	Fix	Released
macOS
Sequoia	15.7.4	Sequoia 15.7.4	Feb 11, 2026
Sonoma	14.8.4	Sonoma 14.8.4	Feb 11, 2026
Tahoe	26.3	Tahoe 26.3	Feb 11, 2026

Details

Published
February 11, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://support.apple.com/en-us/126348

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