What is CVE-2026-11806?

CVE-2026-11806 is a high-severity vulnerability in Ibm Websphere Application Server - Liberty, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.2/10. Published 2026-06-30.

How severe is CVE-2026-11806?

High severity. CVSS v3 base score is 7.2 out of 10.

Vulnerability in Ibm Websphere Application Server - Liberty

CVE-2026-11806

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 is affected by an arbitrary file read vulnerability with the restConnector-2.0 feature enabled.

Vulnerability class: HTTP Request Smuggling

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ibm Websphere Application Server - Liberty — versions 17.0.0.3

Weakness classification (CWE)

CWE-444 — Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling)

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-11806?: CVE-2026-11806 is a high-severity vulnerability in Ibm Websphere Application Server - Liberty, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.2/10. Published 2026-06-30.
How severe is CVE-2026-11806?: High severity. CVSS v3 base score is 7.2 out of 10.