CVE-2026-43776

AppleDouble: Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution

CVE-2026-43776 is fixed in 2 products on 1 platform, first by Sequoia 15.7.8, released July 27, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.8

HIGH

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0019

9th percentile

A buffer overflow was addressed with improved bounds checking.

Where it's fixed

Product	Fixed in	Fix	Released
macOS
Sequoia	15.7.8	Sequoia 15.7.8	Jul 27, 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:H/I:H/A:H
Vendor advisory
https://support.apple.com/en-us/128067

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