CVE-2024-40898: Apache HTTP Server: SSRF with mod_rewrite in server/vhost context on Windows

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-18 · updated 2026-06-17
Weakness: CWE-918

Description

SSRF in Apache HTTP Server on Windows with mod_rewrite in server/vhost context, allows to potentially leak NTML hashes to a malicious server via SSRF and malicious requests. Users are recommended to upgrade to version 2.4.62 which fixes this issue.

Affected products

Apache HTTP Server: before 2.4.62 — fixed in 2.4.62

How to fix

Upgrade to a fixed version: Apache HTTP Server 2.4.62. Check the vendor advisory for mitigations.

References

https://httpd.apache.org/security/vulnerabilities_24.html
http://www.openwall.com/lists/oss-security/2024/07/17/7
https://httpd.apache.org/security/vulnerabilities_24.html
https://security.netapp.com/advisory/ntap-20240808-0006/

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