High 1 exploited CVE DSA-5496-1 1 CVE

firefox-esr - security update

Published Sep 13, 2023 · Updated Mar 9, 2026

Ecosystem: Debian

Fixed packages 2

Release	Package	Fixed in
Debian · 11	firefox-esr	102.15.1esr-1~deb11u1
Debian · 12	firefox-esr	102.15.1esr-1~deb12u1

Vulnerabilities 1

High 8.8

CVE-2023-4863 Exploited Public exploit EPSS 100%

libwebp: OOB write in BuildHuffmanTable

Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: Critical)

Google Chrome libwebp chromium Browsers Debian Ubuntu Azure Linux Alpine Wolfi npm PyPI Go crates.io NuGet

Sep 12, 2023
KEV Sep 13, 2023