CVE-2026-11548 IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty HTTP Request Smuggling
Attackers can exploit HTTP request smuggling in IBM WebSphere Liberty to bypass security controls or access sensitive data.
- 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-2026-11548?
CVE-2026-11548 is a medium-severity vulnerability in IBM WebSphere Application Server, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IBM WebSphere Application Server 8.5 and 9.0, and and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 are affected by an HTTP request smuggling vulnerability.
Weakness: CWE-444
Which versions are affected by CVE-2026-11548?
How do I fix CVE-2026-11548?
No fix has been published for CVE-2026-11548 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-11548 being exploited?
There is no known exploitation of CVE-2026-11548 in the wild and no public exploit code.
Sources
Also known as GHSA-73xv-wjr6-7jg4.