# CVE-2023-28204: Apple Multiple Products WebKit Out-of-Bounds Read Vulnerability

Source: https://junglewise.ai/threats/cve-2023-28204-apple-multiple-products-webkit-out-of-bounds-read-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-05-22. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2023-28204 · Severity: critical · CVSS 6.5 · Exploited in the wild · Published 2023-05-22

An out-of-bounds read vulnerability in Apple's WebKit engine allows for the disclosure of sensitive information when processing maliciously crafted web content. The issue was addressed through improved input validation across multiple Apple operating systems and the Safari browser.

Technologies: [Apple Multiple Products](https://junglewise.ai/threats/technologies/multiple-products). Vendors: [Apple](https://junglewise.ai/threats/vendors/apple).

## Quick answers

**Is CVE-2023-28204 exploited in the wild?** Yes. CVE-2023-28204 is known to be exploited in the wild, first recorded on 22 May 2023. Treat it as urgent.

**How severe is CVE-2023-28204?** Critical severity, with a CVSS score of 6.5, published 22 May 2023.

**Which products and versions are affected?** Apple WebKit versions before Safari 16.5, iOS 16.5, iPadOS 16.5, macOS Ventura 13.4, tvOS 16.5, watchOS 9.5; Apple Safari before 16.5; Apple iOS before 15.7.6 and 16.5; Apple iPadOS before 15.7.6 and 16.5; and 4 more.

**Is there a fix for CVE-2023-28204?** A patch was published on 2023-05-22: Fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.6/16.5, iPadOS 15.7.6/16.5, and Safari 16.5. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2023-28204 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2023-28204?** Check whether you run Apple Multiple Products. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Apple WebKit versions before Safari 16.5, iOS 16.5, iPadOS 16.5, macOS Ventura 13.4, tvOS 16.5, watchOS 9.5
- Apple Safari before 16.5
- Apple iOS before 15.7.6 and 16.5
- Apple iPadOS before 15.7.6 and 16.5
- Apple macOS Ventura before 13.4
- Apple tvOS before 16.5
- Apple watchOS before 9.5
- WebKitGTK WebKitGTK+ before 2.42.3

## Timeline

- 2023-05-22: disclosed: Apple is aware of reports that this issue may have been actively exploited.
- 2023-05-22: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.
- 2023-05-22: patched: Fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.6/16.5, iPadOS 15.7.6/16.5, and Safari 16.5.

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