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Vulnerability record · CVE-2022-48503 · published 14 August 2023

CVE-2022-48503: Apple WebKit bounds check flaw allows code execution via web content

Apple · Safari

Apple fixed an insufficient bounds-checking issue in WebKit across Safari, iOS, iPadOS, macOS, tvOS and watchOS. Processing malicious web content can lead to arbitrary code execution on the affected device. The record does not name the specific component or the exact nature of the bounds error beyond CWE-129.

8.8 CVSS 3.1 High CISA KEV since 20 Oct 2025 EPSS 3.2% · top 12.3% CWE-129 · CWE-129
8.8CVSS 3.1 base score
3.2%EPSS exploitation probability, 30 days
YesIn CISA KEV, fix deadline passed
6Affected product versions listed by NVD
11References
17 Jun 2026Last modified by NVD

Description

The issue was addressed with improved bounds checks. This issue is fixed in tvOS 15.6, watchOS 8.7, iOS 15.6 and iPadOS 15.6, macOS Monterey 12.5, Safari 15.6. Processing web content may lead to arbitrary code execution.

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: medium.

high priorityCVSS 8.8 with network reachability and known exploitation per CISA KEV, though it requires user interaction and the record lacks component-level detail.

What it is

Apple fixed an insufficient bounds-checking issue in WebKit across Safari, iOS, iPadOS, macOS, tvOS and watchOS. Processing malicious web content can lead to arbitrary code execution on the affected device. The record does not name the specific component or the exact nature of the bounds error beyond CWE-129.

Impact

An attacker who gets a victim to load crafted web content can execute arbitrary code in the context of the affected browser or platform component, with high confidentiality, integrity and availability impact per the CVSS vector.

Attack surface

Reached over the network by delivering malicious web content to a browser or WebKit-rendering component; the vector requires user interaction (UI:R) and no privileges (PR:N). No authentication is needed.

Exploitation

Listed in CISA KEV with a 2025-10-20 addition and 2025-11-10 remediation due date, indicating known exploitation. EPSS 30-day probability is about 3.2 percent (87.6th percentile); no ransomware use is recorded.

What to do

  • Update to the fixed versions: tvOS 15.6, watchOS 8.7, iOS 15.6 and iPadOS 15.6, macOS Monterey 12.5, Safari 15.6, or later.
  • Prioritize patching internet-facing and user-browsing devices per BOD 22-01 guidance given the KEV listing.
  • Restrict or monitor browsing of untrusted web content on unpatched Apple devices where patching is delayed.
  • Verify patch state across all six affected product families, not just Safari, since the flaw spans multiple platforms.

Detection

  • Hunt for exploitation attempts or crashes in WebKit/Safari processes on unpatched Apple endpoints.
  • Monitor for unexpected child processes or code execution spawned from browser or WebKit rendering processes.
  • Track asset inventory for devices still running versions below the fixed releases listed in the Apple advisories.

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-2022-48503 to the Known Exploited Vulnerabilities catalog on 20 October 2025 as "Apple Multiple Products Unspecified Vulnerability". Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Federal deadline 10 November 2025.

Affected products

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

References

LinkTags
https://support.apple.com/en-us/HT213340 Release NotesVendor Advisory
https://support.apple.com/en-us/HT213341 Release NotesVendor Advisory
https://support.apple.com/en-us/HT213342 Release NotesVendor Advisory
https://support.apple.com/en-us/HT213345 Release NotesVendor Advisory
https://support.apple.com/en-us/HT213346 Release NotesVendor Advisory
https://support.apple.com/en-us/HT213340 Release NotesVendor Advisory
https://support.apple.com/en-us/HT213341 Release NotesVendor Advisory
https://support.apple.com/en-us/HT213342 Release NotesVendor Advisory
https://support.apple.com/en-us/HT213345 Release NotesVendor Advisory
https://support.apple.com/en-us/HT213346 Release NotesVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-48503 US Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-48503), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.