# CVE-2025-66478: CVE-2025-66478

- Exploited (CISA KEV): no
- Published: unknown
- CVSS: not scored
- EPSS: no score

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

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | No public claim | — | — |
| F5 | Rule published | 2025-12-04 | — |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2025-12-04 · new · rule 200204048
  > Added: signature 200204048 "React Server Components RCE" (Server Side Code Injection, risk High), systems: Node.js, JavaScript, ReactJS. References: CVE-2025-55182, CVE-2025-66478.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2025-12-12 · updated · rule 200204048
  > Updated: signature 200204048 "React Server Components RCE" (Server Side Code Injection, risk High), systems: Node.js, JavaScript, ReactJS. References: CVE-2025-55182, CVE-2025-66478.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2025-12-12 · updated · rule 200204050
  > Updated: signature 200204050 "Next.js RSC Remote Code Execution" (Server Side Code Injection, risk High), systems: Node.js, JavaScript, ReactJS. References: CVE-2025-55182, CVE-2025-66478.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

"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-2025-66478 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2025-66478