CVE-2026-43708

WebKit: A malicious website may exfiltrate data cross-origin

CVE-2026-43708 is fixed in Tahoe on 1 platform by Tahoe 26.5.2 (version 26.5.2), released June 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

4.3

MEDIUM

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0037

31st percentile

The issue was addressed with improved input validation. WebKit Bugzilla: 315306

Where it's fixed

Product	Fixed in	Fix	Released
macOS
Tahoe	26.5.2	Tahoe 26.5.2	Jun 29, 2026

Details

Published
June 29, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Vendor advisory
https://support.apple.com/en-us/127595

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