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CVE-2026-39872 is a WebKit vulnerability affecting Apple Safari, iOS, iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS. The flaw is described as a memory-handling issue in WebKit whereby processing maliciously crafted web content can trigger an unexpected process crash. Apple states the issue was addressed through improved memory handling. Publicly available details do not identify the specific vulnerable function or a more precise root-cause class beyond improper memory handling.
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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.
13 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 an unexpected process crash.
A web content processing vulnerability that could cause an unexpected process crash.
A macOS Tahoe web content processing vulnerability that may lead to an unexpected process crash.
A vulnerability in Apple web content handling acknowledged in the advisory, but no specific technical description is provided in the extracted 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.