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Mallory
Medium

WebKit malicious web content process crash

IdentifiersCVE-2025-43535CWE-119

CVE-2025-43535 is a WebKit vulnerability affecting Safari, WebKitGTK, WPE WebKit, and Apple platforms that use WebKit. The vendor description states that the issue was addressed with improved memory handling and that processing maliciously crafted web content may lead to an unexpected process crash. Available context identifies affected products and fixed versions including Safari 26.2; iOS 18.7.3 and iPadOS 18.7.3; iOS 26.2 and iPadOS 26.2; macOS Tahoe 26.2; visionOS 26.2; and WebKitGTK/WPE WebKit before 2.50.4. The specific vulnerable function is not provided in the supplied content.

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For your environment

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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 can cause the targeted WebKit process to crash while rendering or otherwise processing attacker-controlled web content. Based on the provided information, the demonstrated impact is denial of service at the process level; the supplied content does not provide evidence that this specific CVE enables code execution or data disclosure.

Mitigation

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

Until patches are deployed, reduce exposure to untrusted or attacker-controlled web content in affected WebKit-based applications. Where operationally feasible, restrict browsing to trusted sites, consider disabling JavaScript in WebKitGTK-based browsers, and use alternative browsers or rendering engines not affected by this issue.

Remediation

Patch, then assume compromise.

Apply the vendor fixes: update Safari to 26.2; update Apple devices to iOS 18.7.3, iPadOS 18.7.3, iOS 26.2, iPadOS 26.2, macOS Tahoe 26.2, or visionOS 26.2 as applicable; and update WebKitGTK and WPE WebKit to 2.50.4 or later. Debian guidance in the supplied content recommends upgrading webkit2gtk to 2.50.4-1~deb12u1 for bookworm or 2.50.4-1~deb13u1 for trixie.
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

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

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.
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 activity8

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