Unrated

Use-After-Free in Apple Safari Web Content Processing

IdentifiersCVE-2026-43731CWE-416

CVE-2026-43731 is a use-after-free vulnerability in Apple Safari/WebKit web content processing. According to the provided Apple security information, processing maliciously crafted web content can trigger the flaw and lead to memory corruption. Apple states the issue was addressed through improved memory management. The vulnerability affects Safari and related Apple platforms prior to Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2.

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 may allow remote attackers to induce memory corruption in the targeted web content processing context by luring a user to process attacker-controlled web content. The provided context does not confirm code execution, but memory corruption in this class of bug can result in application instability or crashes and may create conditions for further exploitation. The supplied CVSS-derived facts indicate high confidentiality, integrity, and availability impact.

Mitigation

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

If immediate patching is not possible, reduce exposure by limiting access to untrusted or attacker-controlled web content and using only trusted browsing workflows until updates can be applied. No vendor-specific workaround beyond updating is provided in the supplied content.

Remediation

Patch, then assume compromise.

Apply Apple's fixes by upgrading to Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2 or later, where Apple states the issue was resolved with improved memory management.

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

AppleMacos Tahoeoperating_system

AppleSafariapplication

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

Jun 29, 2026

About the security content of iOS 26.5.2 and iPadOS 26.5.2 - Apple Support

A use-after-free vulnerability in web content processing that could lead to memory corruption.

cvefeed high severityNews

Jun 29, 2026

CVE-2026-43731 - Safari Use-After-Free Memory Corruption

A Safari use-after-free memory corruption vulnerability that can be triggered by processing maliciously crafted web content.

apple supportNews

Jun 29, 2026

About the security content of macOS Tahoe 26.5.2 - Apple Support

A macOS Tahoe web content processing vulnerability involving use-after-free that may lead to memory corruption.

apple supportNews

Jun 29, 2026

About the security content of Safari 26.5.2 - Apple Support

A use-after-free vulnerability in Apple web content processing that could lead to memory corruption.

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 activity1

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

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2026-43731

NVD

nvd.nist.gov/vuln/detail/CVE-2026-43731

MITRE CWE · CWE-416

cwe.mitre.org