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Medium

WebKit process crash on malicious web content

IdentifiersCVE-2026-20608CWE-362

CVE-2026-20608 is a WebKit vulnerability caused by improper state management. Apple states that processing maliciously crafted web content may lead to an unexpected process crash. The issue is referenced in WebKit Bugzilla as 303357 and affects Apple platforms using the vulnerable WebKit code as well as WebKitGTK and WPE WebKit before 2.50.6. Apple reports the issue was fixed through improved state management in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, and visionOS 26.3.

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ANALYST BRIEF

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.

Successful exploitation causes an unexpected crash of the affected WebKit process while rendering or otherwise processing attacker-controlled web content. Based on the provided information, the demonstrated impact is denial of service or application/process instability rather than code execution or privilege escalation.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure to untrusted web content. Practical mitigations include restricting browsing to trusted sites, using web/network filtering, limiting use of Safari or other WebKit-based applications in high-risk environments, and isolating browsing activity to reduce operational impact from renderer/process crashes. No complete mitigation short of updating is provided in the source material.

Remediation

Patch, then assume compromise.

Upgrade to a fixed release. Apple lists fixes in Safari 26.3, iOS 18.7.5, iPadOS 18.7.5, iOS 26.3, iPadOS 26.3, macOS Tahoe 26.3, and visionOS 26.3. For downstream WebKit consumers, update WebKitGTK and WPE WebKit to version 2.50.6 or later.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

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.

VendorProductType
AppleIpadosoperating_system
AppleIphone Osoperating_system
AppleMacosoperating_system
AppleSafariapplication
AppleVisionosoperating_system
Rocky LinuxRocky Linuxoperating_system
WebkitgtkWebkit2gtk3application

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

13 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity7

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-20608
NVD
nvd.nist.gov/vuln/detail/CVE-2026-20608
MITRE CWE · CWE-362
cwe.mitre.org
Vendor Advisory
support.apple.com/en-us/126346
Vendor Advisory
support.apple.com/en-us/126347
Vendor Advisory
support.apple.com/en-us/126348
Vendor Advisory
support.apple.com/en-us/126353
Vendor Advisory
support.apple.com/en-us/126354