CVE-2026-9170
IBM HTTP Server versions 8.5 and 9.0 can crash or allow attackers to run code because the server does not properly validate input. This flaw can let a remote attacker send a specially crafted request that causes the server to stop or execute arbitrary commands. The vulnerability is critical because it can be triggered from the internet without authentication.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
IBM HTTP Server 8.5.0.0 and 9.0.0.0. Administrators who run these versions on public-facing web servers are at risk.
Real-world impact
An attacker could send a request that crashes the server, making the website unavailable, or could run code on the server, potentially taking control of the machine.
Why this severity
The CVSS score of 9.8 reflects that the attack can be performed over the network (AV:N), requires no user interaction (UI:N), and has no authentication (PR:N). The impact is high for confidentiality, integrity, and availability (C:H/I:H/A:H).
What to do about it
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources
Timeline
- May 26, 2026 · May 26, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 20, 2026 · 15d agoAdvisory updatedThe NVD record was last revised.
How it’s attacked
References & advisories
- ibm.com/support/pages/node/7274065vendor advisory