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Process crash in Apple web content processing

IdentifiersCVE-2026-43663CWE-119

CVE-2026-43663 is a memory-handling vulnerability in Apple web content processing components affecting Safari, iOS, iPadOS, and macOS Tahoe. Apple states the issue was addressed with improved memory handling. Processing maliciously crafted web content can trigger the flaw and lead to an unexpected process crash. The available advisory does not identify the specific vulnerable function or a more precise root cause beyond improper memory handling.

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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 web content process, or Safari-related process, to crash unexpectedly, resulting in denial of service for the affected application or browsing session. Based on the provided information, there is no specific evidence that this issue enables code execution, privilege escalation, or data disclosure.

Mitigation

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

Until patches can be applied, reduce exposure by limiting access to untrusted or attacker-controlled web content and using least-privilege browsing practices. Because the issue is triggered by maliciously crafted web content, avoiding suspicious websites and untrusted links may reduce risk, but vendor updates are the primary mitigation.

Remediation

Patch, then assume compromise.

Apply the vendor fixes provided 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
AppleMacosoperating_system
AppleSafariapplication

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

ACTIVITY FEED

Recent activity

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

7 SOURCESView more in app
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 activity4

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

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-43663
NVD
nvd.nist.gov/vuln/detail/CVE-2026-43663
MITRE CWE · CWE-119
cwe.mitre.org