SARA / Free Tools / CVE / CVE-2023-4863

CVE-2023-4863 — Google Chromium WebP Heap-Based Buffer Overflow Vulnerability

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
EPSS
94.08% (top 0.10%)
CWE
Published
2023-09-12T14:24:59.275Z
Last modified
2025-10-21T23:05:38.429Z
CVSS vector
CISA KEV — Actively Exploited
Added to KEV
2023-09-13
BOD 22-01 due
2023-10-04
Ransomware use
Unknown

01What is this vulnerability?

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)

02Affected products

VendorProductVersions
GoogleChrome116.0.5845.187
Googlelibwebp1.3.2

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2023-09-13. Ransomware use: Unknown.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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