# CVE-2022-35256: NodeJS Node

- Exploited (CISA KEV): no
- Published: 2022-12-05
- CVSS: 6.5 MEDIUM (v3.1)
- EPSS: 2.8% (86th percentile)
- CWE: CWE-444

The llhttp parser in the http module in Node v18.7.0 does not correctly handle header fields that are not terminated with CLRF. This may result in HTTP Request Smuggling.

## 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 | Rule published | 2023-01-17 | 43 |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

### F5

- 2023-01-17 · new · rule 200018146
  > Added: signature 200018146 "Request Smuggling Attempt (LF Before TE Header)" (Other Application Attacks, risk High), systems: Node.js. References: CVE-2022-35256.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2023-02-14 · new · rule 200018146
  > Added: signature 200018146 "Request Smuggling Attempt (LF Before TE Header)" (Other Application Attacks, risk High), systems: Node.js. References: CVE-2022-35256.
  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-2022-35256 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2022-35256