Vulnerability in IBM Cics Transaction Gateway For Multiplatforms
CVE-2026-11541
IBM CICS Transaction Gateway for Multiplatforms 9.1, 9.2, 9.3, and 10.1 IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are affected by an HTTP request smuggling vulnerability.
Vulnerability class: HTTP Request Smuggling
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- IBM Cics Transaction Gateway For Multiplatforms — versions 9.1, 9.2, 9.3
- IBM Websphere Application Server — versions 9.0, 8.5
- IBM Websphere Application Server
- IBM Websphere Application Server - Liberty — versions 17.0.0.3
Weakness classification (CWE)
References
- www.ibm.com/support/pages/node/7277550 (vendor-advisory, patch, Vendor Advisory)
- www.ibm.com/support/pages/node/7281750 (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2026-11541?
- CVE-2026-11541 is a high-severity vulnerability in IBM Cics Transaction Gateway For Multiplatforms, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 7.4/10. Published 2026-06-30.
- How severe is CVE-2026-11541?
- High severity. CVSS v3 base score is 7.4 out of 10.