What is CVE-2026-10841?

CVE-2026-10841 is a medium-severity vulnerability in IBM Cics Tx Advanced, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 4.2/10. Published 2026-09-18.

How severe is CVE-2026-10841?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Vulnerability in IBM Cics Tx Advanced

CVE-2026-10841

IBM WebSphere Application Server 8.5, 9.0, and Liberty are vulnerable to HTTP request smuggling.

Vulnerability class: HTTP Request Smuggling

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Ibm Cics Tx Advanced — versions 10.1

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-2026-10841?: CVE-2026-10841 is a medium-severity vulnerability in IBM Cics Tx Advanced, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 4.2/10. Published 2026-09-18.
How severe is CVE-2026-10841?: Medium severity. CVSS v3 base score is 4.2 out of 10.