WebKit process crash on malicious web content
CVE-2026-20636 is a WebKit vulnerability affecting WebKitGTK and WPE WebKit before 2.50.6 and fixed by Apple in Safari 26.3, iOS 26.3, iPadOS 26.3, macOS Tahoe 26.3, and visionOS 26.3. The issue is described as a memory-handling flaw in which processing maliciously crafted web content may lead to an unexpected process crash. Apple and downstream advisories do not provide the vulnerable function or a deeper root-cause narrative beyond stating that the issue was addressed with improved memory handling. Publicly available information therefore supports classifying it as a remotely triggerable browser-engine crash condition caused by malformed web content.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
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.