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CVE-2026-43731 is a use-after-free vulnerability in Apple WebKit that affects Safari and multiple Apple operating systems. The flaw occurs during processing of maliciously crafted web content and was addressed through improved memory management. Successful triggering of the stale object access can lead to memory corruption in the targeted process. Apple indicates the issue is fixed in Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, and watchOS 26.6.
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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.
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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.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A WebKit vulnerability where processing maliciously crafted web content may lead to memory corruption.
A use-after-free vulnerability in Apple macOS Tahoe that could allow denial-of-service on affected systems.
A use-after-free vulnerability in web content processing that could lead to memory corruption.
A Safari use-after-free memory corruption vulnerability that can be triggered by processing 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.