Apple fixes actively exploited WebKit zero-day in iOS, macOS (CVE-2023-23529)

Apple has released security updates that fix a WebKit zero-day vulnerability that “May have been actively exploited.”

The bug has been fixed in iOS 16.3.1 and iPadOS 16.3.1, macOS Ventura 13.2.1, Safari 16.3.1, and possibly also in tvOS 16.3.2 and watchOS 9.3.1 – though release notes for the updates for those Internet of Things operating systems have been temporarily witheld.

An anonymous researcher has been credited with reporting it, but since the update release notes acknowledge The Citizen Lab at The University of Toronto’s Munk School for their assistance, it’s possible that the vulnerability is being exploited to spy on users.

Users running macOS Ventura also get a patch for CVE-2023-23529 with the OS security update, while those who still use macOS Big Sur and macOS Monterey can close the hole by updating Safari to version 16.3.1.

The iOS and iPadOS update also contains a fix for CVE-2023-23514, a use after free issue in the kernel, which could allow a malicious app to execute arbitrary code with kernel privileges.

The macOS update patches it along with a privacy issue in the Shortcuts component.

Share this article on social media:

Subscribe to Our Newsletter!
Stay on top of cybersecurity risks, evolving threats and industry news.
This field is for validation purposes and should be left unchanged.

The Latest Cybersecurity News

From major cyberattacks, newly discovered critical vulnerabilities to recommended best practices, read it here first:

Tell us About your Needs
Get an Answer the Same Business Day

Got an urgent request? Call us at 1-877-805-7475 or Book a meeting.

What happens next:

  • We reach out to learn about your objectives
  • We work together to define your project’s scope
  • You get an all-inclusive, no engagement proposal
This field is for validation purposes and should be left unchanged.


Enter your Email Address

This field is for validation purposes and should be left unchanged.

* No free email provider (e.g:,, etc.)



Everything You Need to Know

Gain confidence in your future cybersecurity assessments by learning to effectively plan, scope and execute projects.
This site is registered on as a development site. Switch to a production site key to remove this banner.