High

WebKit process crash on malicious web content

IdentifiersCVE-2026-28953CWE-119· Improper Restriction of Operations…

CVE-2026-28953 is a WebKit vulnerability affecting Safari and multiple Apple platforms. Apple states that processing maliciously crafted web content may lead to an unexpected process crash. The issue was addressed with improved memory handling, indicating a memory-safety flaw in WebKit during web-content processing, although the specific vulnerable function or code path is not provided in the available content. The vulnerability is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5.

For your environment

Are you exposed to this one?

Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.

Start free trial

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-rendering process, or a related process handling web content, to crash when a victim processes attacker-controlled web content. Based on the provided information, the demonstrated impact is denial of service through process termination. The available content does not provide evidence of code execution, sandbox escape, or information disclosure for this specific CVE.

Mitigation

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

Until patches are applied, reduce exposure to untrusted web content, especially attacker-controlled or suspicious websites. Enterprise defenders can limit use of vulnerable Safari/WebKit-based browsing contexts, enforce rapid patch deployment, and use network controls or content filtering to reduce access to malicious sites. No product-specific workaround beyond patching is provided in the available content.

Remediation

Patch, then assume compromise.

Apply the vendor fixes released by Apple. The issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5. Updating affected systems and browsers to these versions or later is the primary remediation.

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

AppleTvosoperating_system

AppleVisionosoperating_system

AppleWatchosoperating_system

WebkitgtkWebkit2gtk3application

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

ACTIVITY FEED

Recent activity

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

21 SOURCESView more in app

apple supportNews

May 13, 2026

About the security content of Safari 26.5 - Apple Support

Unknown

apple supportNews

May 13, 2026

About the security content of Safari 26.5 - Apple Support

Unknown

handlers diary fullNews

May 11, 2026

Apple Patches Everything - SANS Internet Storm Center

A WebKit vulnerability where maliciously crafted web content may cause an unexpected process crash.

apple supportNews

May 11, 2026

About the security content of macOS Tahoe 26.5 - Apple Support (CA)

A vulnerability in macOS Tahoe acknowledged by Apple, but no technical details are provided in the content excerpt.

+9 more in the timeline

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.

Start free trial

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 activity6