# CVE-2026-23869: Meta react-server-dom-turbopack

- Exploited (CISA KEV): no
- Published: 2026-04-08
- CVSS: 7.5 HIGH (v3.1)
- EPSS: 1.6% (75th percentile)

A denial of service vulnerability exists in React Server Components, affecting the following packages: react-server-dom-parcel, react-server-dom-turbopack and react-server-dom-webpack (versions 19.0.0 through 19.0.4, 19.1.0 through 19.1.5, and 19.2.0 through 19.2.4). The vulnerability is triggered by sending specially crafted HTTP requests to Server Function endpoints.The payload of the HTTP request causes excessive CPU usage for up to a minute ending in a thrown error that is catchable.

## 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 | Before feed history | — | — |
| F5 | Rule published | 2026-07-07 | — |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2026-07-07 · updated · rule 200012099
  > Updated: signature 200012099 "Next.js Denial of Service (2)" (Denial of Service, risk Medium), systems: Node.js, JavaScript, ReactJS. References: CVE-2026-23864, CVE-2026-23869.
  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-2026-23869 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2026-23869