CVE-2026-9170 IBM HTTP Server is affected by multiple vulnerabilities

Critical 9.8 Published 26 May 2026 Updated 11 Jun 2026

Attackers can execute arbitrary code or cause denial of service in IBM HTTP Server via improper input validation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-9170?

CVE-2026-9170 is a critical code injection vulnerability in IBM HTTP Server, published on 26 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service and a potential remote code execution due to improper input validation.

Weakness: CWE-94

Which versions are affected by CVE-2026-9170?

It affects 1 product.

Products include Ibm Http Server.

How do I fix CVE-2026-9170?

No fix has been published for CVE-2026-9170 yet. Limit exposure of the affected software until one is available.

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

Is CVE-2026-9170 being exploited?

There is no known exploitation of CVE-2026-9170 in the wild and no public exploit code.

Sources

Also known as GHSA-q578-5vf7-89mr.