Cross-origin information disclosure in Apple WebKit
CVE-2026-43700 is a cross-origin vulnerability in Apple WebKit affecting Safari 26.5.2 prior versions, iOS 26.5.2 prior versions, iPadOS 26.5.2 prior versions, and macOS Tahoe 26.5.2 prior versions. Apple states the issue was caused by insufficient tracking of security origins. Processing maliciously crafted web content can cause WebKit to mishandle origin boundaries and disclose sensitive user information across origins.
Are you exposed to this one?
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A WebKit information disclosure vulnerability that may expose sensitive user information via crafted web content.
A cross-origin vulnerability that could allow malicious web content to disclose sensitive user information.
A macOS Tahoe cross-origin vulnerability in web content processing that may disclose sensitive user information.
A cross-origin vulnerability in Apple web content processing that could disclose sensitive user information.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.