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CVE-2026-64728 is an improper access-control vulnerability in WebKit permission validation. Maliciously crafted web content can cause WebKit to violate iframe sandboxing policy. The issue affects WebKitGTK and WPE WebKit releases before 2.52.6, and was also fixed in Safari 26.6 and corresponding Apple operating-system releases. The flaw was addressed through improved validation.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
WebKitGTK iframe sandbox-policy bypass vulnerability.
Iframe sandbox-policy bypass vulnerability in WebKitGTK.
A WebKitGTK/WPE WebKit vulnerability addressed by SUSE through the webkit2gtk3 2.52.6 update.
A WebKitGTK/WPE WebKit security vulnerability addressed in the SUSE SLES 15/SLES for SAP 15 webkit2gtk3 security update.
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.