# CVE-2023-5217: Google Chromium libvpx Heap Buffer Overflow Vulnerability

- Exploited (CISA KEV): yes, added 2023-10-02
- Published: 2023-09-28
- CVSS: 8.8 HIGH (v3.1)
- EPSS: 49.0% (99th percentile)
- CWE: CWE-787

Heap buffer overflow in vp8 encoding in libvpx in Google Chrome prior to 117.0.5938.132 and libvpx 1.13.1 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | No public claim | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2023-5217 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2023-5217