CVE-2026-103499 IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by a denial of service
Remote unauthenticated attackers can cause a denial of service in IBM WebSphere Application Server via uncontrolled resource consumption.
- 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-2026-103499?
CVE-2026-103499 is a high-severity denial of service vulnerability in IBM WebSphere Application Server, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 and IBM WebSphere Application Server 8.5, and 9.0 Liberty could allow a remote unauthenticated attacker to cause a denial of service due to uncontrolled resource consumption.
Weakness: CWE-400
Which versions are affected by CVE-2026-103499?
How do I fix CVE-2026-103499?
No fix has been published for CVE-2026-103499 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-103499 being exploited?
There is no known exploitation of CVE-2026-103499 in the wild and no public exploit code.
Sources
Also known as GHSA-hqx9-hfrg-3qwc.