CVE-2026-43735

WebKit: A malicious website may exfiltrate data cross-origin

CVE-2026-43735 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: High.

High

CVSS

8.1

HIGH

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0023

13th percentile

The issue was addressed with improved checks. WebKit Bugzilla: 313357

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:H/I:H/A:N
Vendor advisory
https://support.apple.com/en-us/127595

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2026-43735">CVE-2026-43735 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.