High

Arbitrary code execution in Apple WebKit

IdentifiersCVE-2023-38597CWE-20

Apple states that CVE-2023-38597 was addressed with improved checks in iOS 15.7.8 and iPadOS 15.7.8, iOS 16.6 and iPadOS 16.6, macOS Ventura 13.5, and Safari 16.6. The advisory says that processing web content may lead to arbitrary code execution. Based on the available information, this is a WebKit/Safari web content processing vulnerability in which insufficient validation or checking during handling of malicious web content can result in code execution. Apple did not provide further public technical detail in the supplied content about the specific vulnerable function, root cause beyond 'improved checks,' or exploitation mechanism.

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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 arbitrary code execution in the context of processing malicious web content. In practical terms, a remote attacker could potentially compromise the targeted application or system component that renders the content, which may lead to device compromise, further post-exploitation activity, or additional privilege escalation depending on the execution context and available sandbox escapes or chained vulnerabilities.

Mitigation

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

Until patches can be applied, reduce exposure to untrusted web content. Limit browsing to trusted sites, avoid opening attacker-controlled links or embedded web content, and where possible restrict use of vulnerable Safari/WebKit-based applications on affected devices. Enterprise defenders can also reduce risk through web filtering, attachment/link detonation, and minimizing exposure of high-risk users to untrusted content. No complete mitigation is provided in the supplied content aside from installing the update.

Remediation

Patch, then assume compromise.

Apply the vendor fixes released by Apple. The issue is fixed in iOS 15.7.8 and iPadOS 15.7.8, iOS 16.6 and iPadOS 16.6, macOS Ventura 13.5, and Safari 16.6. Systems running affected earlier versions should be updated to a patched release as soon as operationally feasible.

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

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

2 SOURCESView more in app

apple supportNews

Jan 25, 2026

About the security content of iOS 16.6 and iPadOS 16.6 - Apple Support

A web content processing issue that could lead to arbitrary code execution; addressed with improved checks.

apple supportNews

Jan 19, 2026

Informazioni sui contenuti di sicurezza di iOS 16.6 e iPadOS 16.6 - Supporto Apple (IT)

Use-after-free/corruzione memoria durante elaborazione di contenuti web che può causare danneggiamento memoria (potenzialmente sfruttabile); corretta con migliore gestione memoria.

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