CVE-2026-8855 IBM HTTP Server is affected by multiple vulnerabilities
Attackers can achieve remote code execution or denial of service on IBM HTTP Server when TLS mutual authentication is enabled.
- 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-2026-8855?
CVE-2026-8855 is a high-severity 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 remote code execution and denial of service in configurations with TLS mutual authentication (client authentication).
Weakness: CWE-94
Which versions are affected by CVE-2026-8855?
It affects 1 product.
Products include Ibm Http Server.
How do I fix CVE-2026-8855?
No fix has been published for CVE-2026-8855 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-2026-8855 being exploited?
There is no known exploitation of CVE-2026-8855 in the wild and no public exploit code.
Other vulnerabilities in IBM HTTP Server
Sources
Also known as GHSA-rjqm-vgmr-8cp8.