CVE-2024-43204 Apache HTTP Server: SSRF with mod_headers setting Content-Type header
An attacker can perform Server-Side Request Forgery in Apache HTTP Server if mod_headers is configured to modify Content-Type headers using request values.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-43204?
CVE-2024-43204 is a high-severity server-side request forgery vulnerability in Apache Http Server, published on 10 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
SSRF in Apache HTTP Server with mod_proxy loaded allows an attacker to send outbound proxy requests to a URL controlled by the attacker. Requires an unlikely configuration where mod_headers is configured to modify the Content-Type request or response header with a value provided in the HTTP request.
Users are recommended to upgrade to version 2.4.64 which fixes this issue.
Weakness: CWE-918
Which versions are affected by CVE-2024-43204?
1 open source package ship an affected version, including apache. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
apache Bitnami | From 2.4.0 | 2.4.64 |
Products include Apache Http Server.
How do I fix CVE-2024-43204?
Upgrade apache to 2.4.64 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2024-43204 being exploited?
There is no known exploitation of CVE-2024-43204 in the wild and no public exploit code.
Other vulnerabilities in Apache Http Server
Sources
Also known as ALPINE-CVE-2024-43204, AZL-65169, AZL-65217, BELL-CVE-2024-43204, BIT-apache-2024-43204, DEBIAN-CVE-2024-43204 and 3 more.