CVE-2023-4863
Published 2023-09-12 · Updated 2026-06-17 · Source chrome-cve-admin@google.com
Summary
CVE-2023-4863 is a high-severity (CVSS 8.8) vulnerability in Google Chromium WebP. CISA added it to the Known Exploited Vulnerabilities catalog on September 13, 2023, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by October 4, 2023. CISA does not currently list it as used in ransomware campaigns. Google has 76 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.
All 76 known-exploited Google vulnerabilities →Description
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)
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Google — Chromium WebP
Name: Google Chromium WebP Heap-Based Buffer Overflow Vulnerability
Date added: 2023-09-13 · Due: 2023-10-04
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
References
- http://www.openwall.com/lists/oss-security/2023/09/21/4
- http://www.openwall.com/lists/oss-security/2023/09/22/1
- http://www.openwall.com/lists/oss-security/2023/09/22/3
- http://www.openwall.com/lists/oss-security/2023/09/22/4
- http://www.openwall.com/lists/oss-security/2023/09/22/5
- http://www.openwall.com/lists/oss-security/2023/09/22/6
- http://www.openwall.com/lists/oss-security/2023/09/22/7
- http://www.openwall.com/lists/oss-security/2023/09/22/8