# CVE-2022-26377: mod_proxy_ajp: Possible request smuggling

- Exploited (CISA KEV): no
- Published: 2022-06-08
- CVSS: not scored
- EPSS: 21.1% (98th percentile)
- CWE: CWE-444

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp of Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to. This issue affects Apache HTTP Server Apache HTTP Server 2.4 version 2.4.53 and prior versions.

## 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 | 2023-03-14 | 279 |
| Akamai | No public source | — | — |
| OWASP CRS | Before feed history | — | — |

### F5

- 2023-03-14 · new · rule 200020215
  > Added: signature 200020215 "Apache mod_proxy_ajp HTTP Request Smuggling" (HTTP Parser Attack, risk High), systems: Apache, Apache Tomcat. References: CVE-2022-26377, CVE-2022-36760.
  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-2022-26377 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2022-26377