CVE-2024-38473
Apache HTTP Server proxy encoding problem
- Published
- Jul 1, 2024
- Updated
- Feb 13, 2025
- Assigning CNA
- apache
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HModerate · next 30 days
- Percentile
- 98.0%
- Model date
- Oct 17, 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
Encoding problem in mod_proxy in Apache HTTP Server 2.4.59 and earlier allows request URLs with incorrect encoding to be sent to backend services, potentially bypassing authentication via crafted requests. Users are recommended to upgrade to version 2.4.60, which fixes this issue.
Sources
- Apache HTTP Server - ACL BypassTemplate
http/cves/2024/CVE-2024-38473.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: status,word($.matchers[*].type)
Proof-of-concept demonstrating an encoding flaw in Apache HTTP Server mod_proxy that can bypass authentication via crafted encoded URLs.
Responsible use
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