Quick answers
- Is CVE-2026-11722 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-11722 being exploited in the wild.
- How severe is CVE-2026-11722?
- Medium severity, with a CVSS score of 4.8, published 18 September 2026.
- Which products and versions are affected?
- IBM WebSphere Application Server multiple versions; IBM WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.8.
- Is there a fix for CVE-2026-11722?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-11722 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-11722?
- Check whether you run IBM WebSphere Application Server or IBM WebSphere Application Server Liberty at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
HTTP request smuggling arises from inconsistent interpretation of HTTP request boundaries between the front-end proxy and backend server. An attacker can craft malformed requests to trick the server into processing unintended commands, typically requiring network access but no authentication. Exploitation may expose backend functionality or enable session hijacking.
Affected products
- IBM WebSphere Application Server multiple versions
- IBM WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.8
Timeline
- 2026-09-18: disclosed