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Vulnerability record · CVE-2023-37450 · published 27 July 2023

CVE-2023-37450: Apple WebKit web content processing arbitrary code execution

Apple · Safari

Apple WebKit fails to properly validate web content, allowing arbitrary code execution when a victim processes a crafted page. The flaw affects Safari, iOS, iPadOS, macOS, tvOS, watchOS and WebKitGTK, and Apple states it may have been actively exploited.

8.8 CVSS 3.1 High CISA KEV since 13 Jul 2023 EPSS 19% · top 2.8%
8.8CVSS 3.1 base score
19%EPSS exploitation probability, 30 days
YesIn CISA KEV, fix deadline passed
7Affected product versions listed by NVD
13References
17 Jun 2026Last modified by NVD

Description

The issue was addressed with improved checks. This issue is fixed in iOS 16.6 and iPadOS 16.6, Safari 16.5.2, tvOS 16.6, macOS Ventura 13.5, watchOS 9.6. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: high.

high priorityThe vulnerability is in CISA KEV with confirmed active exploitation and a high EPSS percentile, though it requires user interaction to trigger.

What it is

Apple WebKit fails to properly validate web content, allowing arbitrary code execution when a victim processes a crafted page. The flaw affects Safari, iOS, iPadOS, macOS, tvOS, watchOS and WebKitGTK, and Apple states it may have been actively exploited.

Impact

An attacker can execute arbitrary code in the context of the affected browser or WebKit-based application, potentially leading to full compromise of the user's device.

Attack surface

Reached remotely over the network by delivering malicious web content; the CVSS vector shows no privileges required but user interaction is required, meaning the victim must load the crafted content.

Exploitation

Listed in CISA KEV with a 2023-08-03 remediation due date, and EPSS 30-day probability is 0.1895 (97th percentile), indicating observed exploitation and elevated risk.

What to do

  • Apply the vendor updates: iOS 16.6, iPadOS 16.6, Safari 16.5.2, tvOS 16.6, macOS Ventura 13.5 and watchOS 9.6.
  • Update WebKitGTK packages per the Gentoo GLSA 202401-04 advisory.
  • If updates cannot be applied, restrict or discontinue use of the affected products as CISA directs.
  • Enforce prompt browser and OS patching for all Apple and WebKitGTK endpoints.
  • Limit browsing of untrusted web content on unpatched devices.

Detection

  • Monitor for crashes or unexpected code execution in Safari, WebKit and WebKitGTK processes.
  • Review endpoint telemetry for suspicious child processes spawned by browser or WebKit processes.
  • Hunt for network fetches of known exploit-hosting domains tied to WebKit exploitation campaigns.
  • Audit asset inventories for unpatched iOS, iPadOS, macOS, tvOS, watchOS and WebKitGTK versions.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.

Exploitation in the wild

CISA added CVE-2023-37450 to the Known Exploited Vulnerabilities catalog on 13 July 2023 as "Apple Multiple Products WebKit Code Execution Vulnerability". Required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable. Federal deadline 3 August 2023.

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://security.gentoo.org/glsa/202401-04 Third Party Advisory
https://support.apple.com/en-us/HT213826 Vendor Advisory
https://support.apple.com/en-us/HT213841 Vendor Advisory
https://support.apple.com/en-us/HT213843 Vendor Advisory
https://support.apple.com/en-us/HT213846 Vendor Advisory
https://support.apple.com/en-us/HT213848 Vendor Advisory
https://security.gentoo.org/glsa/202401-04 Third Party Advisory
https://support.apple.com/en-us/HT213826 Vendor Advisory
https://support.apple.com/en-us/HT213841 Vendor Advisory
https://support.apple.com/en-us/HT213843 Vendor Advisory
https://support.apple.com/en-us/HT213846 Vendor Advisory
https://support.apple.com/en-us/HT213848 Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-37450 US Government Resource

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Source: NIST National Vulnerability Database (record CVE-2023-37450), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.