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CVE-2026-20635 is a memory-handling vulnerability in WebKit that affects Apple platforms and downstream WebKit ports including WebKitGTK and WPE WebKit. Processing maliciously crafted web content can trigger an unexpected process crash. Apple states the issue was addressed with improved memory handling, and WebKitGTK/WPE WebKit indicate affected versions are those prior to 2.50.6. Publicly available details describe the outcome as a crash condition rather than confirmed code execution, and do not identify the specific vulnerable function.
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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.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
WebKit crash triggered by malicious web content.
Unknown (CVE listed without impact/description in provided 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.