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CVE-2025-43440 is a WebKit vulnerability affecting Safari, WebKitGTK, WPE WebKit, and Apple platforms that ship the vulnerable WebKit code. Processing maliciously crafted web content can trigger an unexpected process crash. The issue was addressed through improved checks. Reported affected software includes WebKitGTK and WPE WebKit before 2.50.2, and Apple fixed the issue in Safari 26.1, iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, and watchOS 26.1, with corresponding fixes also released for supported macOS Sonoma and macOS Sequoia versions. Publicly available information describes the flaw as a web-content handling bug that results in denial of service via crash; no specific vulnerable function is identified.
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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.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Use-after-free in web content processing leading to Safari crash.
A web content processing vulnerability that may cause an unexpected process crash on macOS Sonoma and macOS Sequoia.
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.