CVE-2023-4863: Chromium: CVE-2023-4863 Heap buffer overflow in WebP

Overview

Severity
N/A
Category
Edge - Chromium
Exploit Status
Actively Exploited
Publicly Disclosed
Yes
Patch Tuesday
2023-Sep
Released
2023-09-12
Last Updated
2025-10-30
EPSS Score
94.08% (percentile: 99.9%)

Description

This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information. Google is aware that an exploit for CVE-2023-4863 exists in the wild.

FAQ

Why is this Chrome CVE included in the Security Update Guide? The vulnerability assigned to this CVE is in Chromium Open Source Software (OSS) which is consumed by Microsoft Edge (Chromium-based). It is being documented in the Security Update Guide to announce that the latest version of Microsoft Edge (Chromium-based) is no longer vulnerable. How can I see the version of the browser? In your Microsoft Edge browser, click on the 3 dots (...) on the very right-hand side of the window Click on Help and Feedback Click on About Microsoft Edge How can I find out what version of Teams I am running? Click on the User Avatar at the top right of the Teams Windows. Click on About, then Version. The version will be displayed in the banner below the Search bar. Where do I get the latest version of Teams? The latest version of Microsoft Teams can be downloaded at https://teams.microsoft.com/download. How can I find out what version of Skype I am running? Select the three dots (...) to the right of your avatar. Select Settings. Select Help & Feedback. The version will be displayed below the Skype logo. How do I get the updated Webp app? The Microsoft Store will automatically update affected customers. Alternatively, customers can get the update immediately; see here for details. See Get updates for apps and games in Microsoft Store for more information about how to get app updates. It is possible for customers to disable automatic updates for the Microsoft Store. The Microsoft Store will not automatically install this update for those customers. My system is in a disconnected environment; is it vulnerable? Customers using the Microsoft Store for Business and Microsoft Store for Education can get this update through their organizations. How can I check if the update is installed? App package versions 1.0.62681.0 and later contain this update. You can check the package version in PowerShell: Get-AppxPackage -Name Microsoft.WebpImageExtension What is the version information

Detection & Weaponization (1 sources)

Maturity: Exploit

  • GitHub PoC: 10 repositories

Affected Products (4)

Browser

  • Microsoft Edge (Chromium-based)

Windows

  • WebP Image Extension

Microsoft Office

  • Microsoft Teams for Desktop
  • Microsoft Teams for Mac, Classic Edition

Security Updates (1)

Revision History

  • 2023-09-12: Information published.
  • 2023-09-30: Updated CVE detail with information regarding other Microsoft products affected by this vulnerability. This is an informational change only.
  • 2023-10-02: Updated CVE detail with information regarding other Microsoft products affected by this vulnerability. Microsoft recommends updating to the latest version of the products listed in the CVE.
  • 2023-10-04: Updated FAQ information. This is an informational change only.
  • 2023-10-11: Removed VP9 Video Extensions from the Security Update table as this product is not affected by this vulnerability.
  • 2023-11-14: Updated CVE detail with information regarding other Microsoft products affected by this vulnerability. Microsoft recommends updating to the latest version of the products listed in the CVE.
  • 2025-10-30: Updated product information in the Software Update table. This is an informational change only.