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CVE-2024-38476

CriticalPublished

Apache HTTP Server may use exploitable/malicious backend application output to run local handlers via internal redirect

Published: Jul 1, 2024
Updated: Nov 3, 2025
Assigning CNA: apache
Evidence observed: Aug 6, 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

41.6%

Moderate · next 30 days

Percentile: 98.7%
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

Vulnerability in core of Apache HTTP Server 2.4.59 and earlier are vulnerably to information disclosure, SSRF or local script execution via backend applications whose response headers are malicious or exploitable. Users are recommended to upgrade to version 2.4.60, which fixes this issue.

Sources

Apache-Authentication-Flaw-Research-CVE-2024-38476-Research
Technical research paper analyzing CVE-2024-38476, a critical Apache HTTP Server vulnerability enabling SSRF, information disclosure, and potential RCE through semantic ambiguity in backend response handling.
apache-vulnerability-testingPoC
Apache HTTP Server Vulnerability Testing Tool | PoC for CVE-2024-38472 , CVE-2024-39573 , CVE-2024-38477 , CVE-2024-38476 , CVE-2024-38475 , CVE-2024-38474 , CVE-2024-38473 , CVE-2023-38709

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