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CVE-2026-43731 is a use-after-free vulnerability in WebKit affecting Apple products, WebKitGTK, and WPE WebKit. Improper memory management during processing of maliciously crafted web content can cause memory corruption. WebKitGTK and WPE WebKit versions before 2.52.5 are affected. Apple fixed the issue in Safari 26.5.2 and corresponding operating-system updates. Exploitation may enable unauthorized code execution, disclosure of memory, or application crashes. The specific vulnerable function is not identified.
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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.
30 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A WebKitGTK memory-corruption vulnerability reachable through maliciously crafted web content.
A WebKitGTK vulnerability in which maliciously crafted web content may cause memory corruption. The advisory includes a fix but does not specify further exploitation consequences.
A WebKitGTK vulnerability in which maliciously crafted web content may lead to memory corruption.
A WebKitGTK memory corruption vulnerability triggered by maliciously crafted web content.
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.