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CVE-2026-28942 is a WebKit memory-safety vulnerability caused by a use-after-free condition. When Safari or another affected Apple platform component processes maliciously crafted web content, stale object reuse can occur after memory has been freed, resulting in unsafe memory access. Apple states the issue was addressed through improved memory management. The vulnerability affects Safari 26.5 and Apple platform releases including iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5. The documented impact is an unexpected Safari crash during web content processing.
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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.
21 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A UI handling issue in Apple software where a malicious iframe may use another website’s download settings.
A UI handling issue in Apple software for macOS Sonoma and macOS Sequoia where a malicious iframe may use another website’s download settings.
A WebKit vulnerability where maliciously crafted web content may cause an unexpected Safari crash.
A specific Apple security vulnerability fixed in the referenced updates; the content only identifies it by CVE and researcher attribution, without technical details.
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.