---
id: "CVE-2023-32409"
kind: "vulnerability"
aliases: ["CVE-2023-32409"]
title: "The issue was addressed with improved bounds checks"
severity: "high"
cvss: 8.6
epss: null
exploited: true
status: "open"
category: "runtime"
products: [{"name": "Apple Multiple Products", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "apple safari", "fixed": ["16.5"], "affected": "< 16.5", "ecosystem": "vendor"}, {"name": "apple ipados", "fixed": ["15.7.8"], "affected": ">= 15.0, < 15.7.8", "ecosystem": "vendor"}, {"name": "apple ipados", "fixed": ["16.5"], "affected": ">= 16.0, < 16.5", "ecosystem": "vendor"}, {"name": "apple iphone os", "fixed": ["15.7.8"], "affected": ">= 15.0, < 15.7.8", "ecosystem": "vendor"}, {"name": "apple iphone os", "fixed": ["16.5"], "affected": ">= 16.0, < 16.5", "ecosystem": "vendor"}, {"name": "apple macos", "fixed": ["13.4"], "affected": ">= 13.0, < 13.4", "ecosystem": "vendor"}, {"name": "apple tvos", "fixed": ["16.5"], "affected": "< 16.5", "ecosystem": "vendor"}, {"name": "apple watchos", "fixed": ["9.5"], "affected": "< 9.5", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["apple", "embedded-webkit", "exploited", "ios", "macos", "runtime", "safari", "webkit"]
not_affected_if: ["no-apple-devices-in-fleet"]
published_at: "2023-05-22T00:00:00+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-32409", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-32409", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# The issue was addressed with improved bounds checks

A flaw in Apple's WebKit browser engine lets a remote attacker escape the Web Content sandbox on iOS, iPadOS, macOS, tvOS, watchOS and Safari. CISA reports it is being exploited in the wild, so an attacker who gets a malicious page rendered can reach beyond the browser process.

_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 < 16.5 fixed 16.5
- vendor:apple ipados affected >= 15.0, < 15.7.8 fixed 15.7.8
- vendor:apple ipados affected >= 16.0, < 16.5 fixed 16.5
- vendor:apple iphone os affected >= 15.0, < 15.7.8 fixed 15.7.8
- vendor:apple iphone os affected >= 16.0, < 16.5 fixed 16.5
- vendor:apple macos affected >= 13.0, < 13.4 fixed 13.4
- vendor:apple tvos affected < 16.5 fixed 16.5
- vendor:apple watchos affected < 9.5 fixed 9.5

## Fix

Apply the Apple updates for iOS, iPadOS, macOS, tvOS, watchOS and Safari per vendor instructions; the sources do not name fixed versions.
For non-Apple products that embed WebKit, update to a WebKit build that includes the fix; the sources do not name it.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-32409
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-32409

## From the sources

Apple iOS, iPadOS, macOS, tvOS, watchOS, and Safari WebKit contain an unspecified vulnerability that can allow a remote attacker to break out of the Web Content sandbox. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

CISA required action: Apply updates per vendor instructions.

---

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