Medium

WebKit malicious web content Safari crash

IdentifiersCVE-2025-43272CWE-119· Improper Restriction of Operations…

CVE-2025-43272 is a WebKit vulnerability affecting Safari and Apple platforms that process web content. Apple states that processing maliciously crafted web content may lead to an unexpected Safari crash. The issue was remediated through improved memory handling, indicating a memory-safety flaw in WebKit, although Apple did not publicly disclose the specific vulnerable function or root-cause primitive. The vulnerability is fixed in Safari 26, iOS 26, iPadOS 26, macOS Tahoe 26, visionOS 26, and watchOS 26.

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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 Safari to crash while rendering attacker-controlled web content, resulting in denial of service for the browser or affected WebKit process. Based on the available advisory text, there is no confirmed public evidence in the provided content that this issue enables code execution, sandbox escape, or data disclosure; the documented impact is unexpected process termination/crash.

Mitigation

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

Until patches can be applied, reduce exposure by limiting use of Safari/WebKit to trusted sites and untrusted web content, especially attacker-controlled pages. Enterprise defenders can lower risk through web filtering, content isolation, and restricting browsing from high-risk devices. These are temporary risk-reduction measures only; the vendor fix is the proper mitigation.

Remediation

Patch, then assume compromise.

Apply Apple's security updates that include the WebKit fix for CVE-2025-43272. The issue is fixed in Safari 26, iOS 26, iPadOS 26, macOS Tahoe 26, visionOS 26, and watchOS 26. Standard remediation is to upgrade affected Apple devices and browsers to the patched versions 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

AppleWatchosoperating_system

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

ACTIVITY FEED

Recent activity

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

5 SOURCESView more in app

apple supportNews

Jan 26, 2026

About the security content of iOS 26 and iPadOS 26 - Apple Support

A web content processing issue that could cause an unexpected Safari crash; addressed with improved memory handling.

the hacker newsNews

Sep 16, 2025

Apple Backports Fix for CVE-2025-43300 Exploited in Sophisticated Spyware Attack

A vulnerability in WebKit that could result in unexpected Safari crash when processing maliciously crafted web content.

sans iscNews

Sep 15, 2025

Apple Updates Everything - iOS/macOS 26 Edition

A WebKit vulnerability where malicious web content may cause an unexpected Safari crash.

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 signatures1

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 activity2