CISA-confirmed known exploited vulnerability

CVE-2023-4863

Google Chromium WebP Heap-Based Buffer Overflow Vulnerability

Google · Chromium WebP

Vulnerability details

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.

Added to CISA KEV: 2023-09-13

Ransomware campaign use: Unknown

CISA due date: 2023-10-04

Defensive guidance from CISA

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

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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