Chrome zero-day is actually in libwebp (CVE-2023-5129)

The Chrome zero-day exploited in the wild and patched by Google a few weeks ago has a new ID and a description that tells the whole story: the vulnerability is not in Chrome, but the libwebp library, which is used by many popular applications for encoding/decoding the WebP image format.

The source of the vulnerability is a flawed implementation of the Huffman coding algorithm, which may allow attackers to trigger a heap buffer overflow and to execute arbitrary code.

CVE-2023-5129 affects libwebp versions 0.5.0 to 1.3.1, and has been fixed in version 1.3.2.

Rezilion researchers have previously posited that CVE-2023-41064, a buffer overflow vulnerability in the ImageI/O framework recently fixed by Apple and exploited to deliver NSO Group’s Pegasus spyware, and CVE-2023-4863, the aforementioned Chrome zero-day, are effectively the same flaw.

Some of these have already incorporated patched for the vulnerability, and some have yet to do it.

The good news for enterprises using vulnerability scanners is that they will finally be able to automatically detect and proceed to remediate the vulnerability across their systems.

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:

A Vumetric expert will contact you to learn more about your cybersecurity needs and goals.

The project's scope will be defined (Target environment, deadlines, requirements, etc.)

A detailed quote including all-inclusive pricing and statement of work is sent to you.

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


Everything You Need to Know

Gain confidence in your future cybersecurity assessments by learning to effectively plan, scope and execute projects.


Enter your Email Address

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

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

This site is registered on as a development site. Switch to a production site key to remove this banner.