An attacker was able to perform an out-of-bounds read or write on a JavaScript Promise object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.

An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes.

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

Chromium: CVE-2023-5217 Heap buffer overflow in vp8 encoding in libvpx