CVE-2026-28899

CoreServices: An app may bypass Gatekeeper checks

CVE-2026-28899 is fixed in 2 products on 1 platform, first by Tahoe 26.6, released July 27, 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

0.0018

7th percentile

A logic issue was addressed with improved checks.

Where it's fixed

Product	Fixed in	Fix	Released
macOS
Sequoia	15.8	Sequoia 15.8	Sep 14, 2026
Tahoe	26.7	Tahoe 26.7	Sep 14, 2026
Tahoe	26.6	Tahoe 26.6	Jul 27, 2026

Details

Published
July 27, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Vendor advisory
https://support.apple.com/en-us/128067

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