CVE-2024-39573: Apache HTTP Server: mod_rewrite proxy handler substitution

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 35.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-01 · updated 2026-06-17
Weakness: CWE-20

Description

Potential SSRF in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to cause unsafe RewriteRules to unexpectedly setup URL's to be handled by mod_proxy. Users are recommended to upgrade to version 2.4.60, which fixes this issue.

Affected products

Apache HTTP Server: from 2.4.0 before 2.4.60 — fixed in 2.4.60
NetApp ONTAP 9: 9

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.4.60. Check the vendor advisory for mitigations.

References

https://httpd.apache.org/security/vulnerabilities_24.html
https://security.netapp.com/advisory/ntap-20240712-0001/
http://seclists.org/fulldisclosure/2024/Oct/11
http://www.openwall.com/lists/oss-security/2024/07/01/11
https://httpd.apache.org/security/vulnerabilities_24.html
https://security.netapp.com/advisory/ntap-20240712-0001/

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