CVE-2023-4863

What is affected

Vendor	Google
Product	Chromium WebP
Weakness	CWE-787

The vulnerability

Google Chromium WebP contains a heap-based buffer overflow vulnerability that allows a remote attacker to perform an out-of-bounds memory write via a crafted HTML page. This vulnerability can affect applications that use the WebP Codec.

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

US federal civilian agencies were required to act by 4 October 2023 under BOD 22-01. The deadline is a compliance date, not a measure of severity — it says nothing about how dangerous the flaw is to anyone else.

Where this comes from

Every field on this page is taken from the CISA Known Exploited Vulnerabilities catalog, last synced 13 Nov 2026, 03:29. Nothing here is our own assessment. For the technical scoring, see the NVD record below.

NVD record ↗ CVE.org record ↗