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CVE-2023-4863

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 secu...

Published: Sep 12, 2023Updated: Oct 24, 2025 Sources: CVE List NVD GHSA BDU csafCWE-787
NVD MITRE
8.8CVSSHIGH
EPSS Score
99.7%
Top 0.0%
CISA KEV
Active Exploitation
Since Sep 13, 2023
Exploits
1 Known
Remediation
Patch Available

Description

libwebp: OOB write in BuildHuffmanTable

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

Red Hat Enterprise LinuxRed Hat Inc.
On-premOS
Operating Systems / linux-distro
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
UbuntuCanonical Ltd.
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
red hat inc.commercialUSOperating Systemsaka red hat
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
canonical ltd.commercialGBOperating Systemsaka canonical
ооо «ред софт»commercialRUOperating Systemsaka red soft
and 42 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Sep 13, 2023
Remediation due:Oct 4, 2023

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

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html
chromereleases.googleblog.com
https://www.darkreading.com/dr-global/qatar-cyber-chiefs-warn-mozilla-rce-bugs
darkreading.com
https://www.mozilla.org/en-US/security/advisories/mfsa2023-40/#CVE-2023-4863
mozilla.org
and 112 more references View all →

Timeline

Published
Sep 12, 2023
Added to CISA KEV
Sep 13, 2023
Last Updated
Oct 24, 2025

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