CVE-2023-4863
Actively exploited. CVE-2023-4863 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-09-13) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2023-4863 is indexed in GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
Google Chromium WebP contains a heap-based buffer overflow vulnerability that allows a remote attacker to perform an out-of-bounds memory write via a crafted HTML page. This vulnerability can affect applications that use the WebP Codec.
CSIRTS triage
- What
- A heap-based buffer overflow vulnerability in Google Chromium WebP allows for out-of-bounds memory writes.
- Who is affected
- Applications using the WebP Codec in Google Chromium are affected.
- Urgency
- Immediate remediation is necessary due to active exploitation and critical severity.
- Action
- Users should update Google Chromium to the latest version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2023-4863 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (1)
- criticalexploitedCVE-2023-4863: Google Chromium WebP Heap-Based Buffer Overflow Vulnerabilitycisa-kev · 2023-09-13
External references
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[](https://www.csirts.com/cve/CVE-2023-4863)