Unrated

WebKit memory-handling vulnerability causing Safari crash

IdentifiersCVE-2026-43716CWE-399

CVE-2026-43716 is a WebKit memory-handling vulnerability affecting Safari and Apple platforms that ship the WebKit engine. Apple describes the issue as being addressed with improved memory handling. When Safari processes maliciously crafted web content, the flaw can be triggered and cause an unexpected Safari crash. The available content does not identify the specific vulnerable function or code path, so the root cause cannot be narrowed further beyond an unspecified memory-management flaw in WebKit.

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 causes Safari to crash while processing attacker-controlled web content. Based on the provided information, the demonstrated impact is denial of service of the browser process; no evidence in the supplied content confirms code execution, privilege escalation, or data disclosure for this specific CVE.

Mitigation

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

Until patches can be applied, reduce exposure by limiting use of untrusted web content in Safari and WebKit-based contexts. Enterprise defenders can prefer alternate browsers where operationally feasible, restrict access to untrusted sites, and use standard browser hardening and isolation controls. No vendor-specific workaround beyond updating is provided in the supplied content.

Remediation

Patch, then assume compromise.

Apply the vendor fixes released by Apple. The issue is fixed in Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2.

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

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

6 SOURCESView more in app

security affairsNews

Jun 30, 2026

Apple Fixes WebKit Flaws in iOS and macOS, With Help From AI Tools - Security Affairs

A WebKit vulnerability that can trigger an unexpected Safari crash when processing maliciously crafted web content.

the hacker newsNews

Jun 30, 2026

Apple Patches 30+ iOS, macOS, Safari Flaws, Including AI-Discovered WebKit Bugs

A WebKit/Safari vulnerability that can trigger an unexpected Safari crash when processing maliciously crafted web content.

handlers diary fullNews

Jun 30, 2026

June 2026 Apple Updates - SANS Internet Storm Center

A WebKit vulnerability where malicious web content may cause Safari to crash unexpectedly.

apple supportNews

Jun 29, 2026

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

A web content processing vulnerability that could cause an unexpected Safari crash.

+2 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.

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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 activity

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

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2026-43716

NVD

nvd.nist.gov/vuln/detail/CVE-2026-43716

MITRE CWE · CWE-399

cwe.mitre.org