CVE-2026-42356 Apache HTTP Server: limited RCE for some internal redirects to non-CGI files in CGI directories

What is CVE-2026-42356?

CVE-2026-42356 is a low-severity code injection vulnerability in Apache Http Server, published on 1 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Deployment of wrong handler vulnerability in Apache HTTP Server allows the target of some internal redirects from CGI programs to also be treated as CGI and executed. The target must already be in a directory enabled for CGI and have no other extension understood by mod_mime.

This issue affects Apache HTTP Server: from 2.4.60 through 2.4.68.

Weakness: CWE-430

Which versions are affected by CVE-2026-42356?

1 open source package ship an affected version, including apache. It affects 1 product.

Products include Apache Http Server.

How do I fix CVE-2026-42356?

Upgrade apache to 2.4.69 or later.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2026-42356 being exploited?

There is no known exploitation of CVE-2026-42356 in the wild and no public exploit code.

Other vulnerabilities in Apache Http Server

• CVE-2021-42013 Apache HTTP Server Path Traversal Exploited Critical 9.8
• CVE-2024-38475 Apache HTTP Server Improper Escaping of Output Exploited Critical 9.1
• CVE-2021-40438 Apache HTTP Server-Side Request Forgery (SSRF) Exploited Critical 9.0
• CVE-2019-0211 Apache HTTP Server Privilege Escalation Exploited High 7.8
• CVE-2021-41773 Apache HTTP Server Path Traversal Exploited High 7.5

All Apache Http Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2026-42356, AZL-106752, BELL-CVE-2026-42356, BIT-apache-2026-42356, CLSA-2026-1791881377, CLSA-2026-1791883129 and 7 more.