sharp vulnerability in libwebp dependency CVE-2023-4863

Overview

sharp uses libwebp to decode WebP images and versions prior to the latest 0.32.6 are vulnerable to the high severity https://github.com/advisories/GHSA-j7hp-h8jx-5ppr.

Who does this affect?

Almost anyone processing untrusted input with versions of sharp prior to 0.32.6.

How to resolve this?

Using prebuilt binaries provided by sharp?

Most people rely on the prebuilt binaries provided by sharp.

Please upgrade sharp to the latest 0.32.6, which provides libwebp 1.3.2.

Using a globally-installed libvips?

Please ensure you are using the latest libwebp 1.3.2.

Possible workaround

Add the following to your code to prevent sharp from decoding WebP images.

sharp.block({ operation: ["VipsForeignLoadWebp"] });