Google is aware that an exploit for CVE-2023-4863 exists in the wild.
Heap buffer overflow in WebP in Google Chrome prior to 116.0.5845.187 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)
There is another related security vulnerability.
There's another related CVE (CVE-2023-5217) that is fixed in Chromium 117.0.5938.132. This one is triggered by WebCodecs API encoder usage, so a workaround for older versions is to disable the WebCodecs API (
As per https://magpcss.org/ceforum/viewtopic.php?f=6&t=19551#p54150