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CVE-2022-22720

CriticalPublished

HTTP request smuggling vulnerability in Apache HTTP Server 2.4.52 and earlier

Published: Mar 14, 2022
Updated: Aug 3, 2024
Assigning CNA: apache
Evidence observed: Aug 8, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

28.2%

Moderate · next 30 days

Percentile: 98.1%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Apache HTTP Server 2.4.52 and earlier fails to close inbound connection when errors are encountered discarding the request body, exposing the server to HTTP Request Smuggling

Sources

CVE-2022-22720PoC
Proof-of-concept exploit for CVE-2022-22720, a vulnerability in Apache HTTP Server. Provides a Dockerfile for reproduction and testing.

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