---
id: "CVE-2022-48503"
kind: "vulnerability"
aliases: ["CVE-2022-48503"]
title: "The issue was addressed with improved bounds checks"
severity: "high"
cvss: 8.8
epss: null
exploited: true
status: "open"
category: "vendor"
products: [{"name": "Apple Multiple Products", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "apple safari", "fixed": ["15.6"], "affected": "< 15.6", "ecosystem": "vendor"}, {"name": "apple ipados", "fixed": ["15.6"], "affected": "< 15.6", "ecosystem": "vendor"}, {"name": "apple iphone os", "fixed": ["15.6"], "affected": "< 15.6", "ecosystem": "vendor"}, {"name": "apple macos", "fixed": ["12.5"], "affected": ">= 12.0.0, < 12.5", "ecosystem": "vendor"}, {"name": "apple tvos", "fixed": ["15.6"], "affected": "< 15.6", "ecosystem": "vendor"}, {"name": "apple watchos", "fixed": ["8.7"], "affected": "< 8.7", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["apple", "exploited", "ios", "macos", "safari", "vendor", "web-browsing"]
not_affected_if: ["fully-patched-devices"]
published_at: "2023-08-14T23:15:10+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T23:44:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-48503", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48503", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# The issue was addressed with improved bounds checks

A flaw in Apple's JavaScriptCore engine lets specially crafted web content run arbitrary code on affected Apple devices and Safari. CISA reports it is being exploited in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Apple Multiple Products affected ? fixed ?
- vendor:apple safari affected < 15.6 fixed 15.6
- vendor:apple ipados affected < 15.6 fixed 15.6
- vendor:apple iphone os affected < 15.6 fixed 15.6
- vendor:apple macos affected >= 12.0.0, < 12.5 fixed 12.5
- vendor:apple tvos affected < 15.6 fixed 15.6
- vendor:apple watchos affected < 8.7 fixed 8.7

## Fix

Update macOS, iOS, tvOS, watchOS and Safari to a vendor release that includes the fix; if the device or OS version is end-of-life, replace it. Specific fixed versions are not in the sources.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-48503
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2022-48503

## From the sources

Apple macOS, iOS, tvOS, Safari, and watchOS contain an unspecified vulnerability in JavaScriptCore that when processing web content may lead to arbitrary code execution. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.

CISA 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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_