Vulnerability · Published Jun 30, 2026 · Assigned by ibm

CVE-2026-11541Inconsistent Interpretation of HTTP Requests in CICS Transaction Gateway for Multiplatforms.

High 7.4

In plain English

A high-severity security flaw in CICS Transaction Gateway for Multiplatforms from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities).

Severity (CVSS 3.1)7.4High

Exploit odds (30 days)0.4%top 63.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
IBM	CICS Transaction Gateway for Multiplatforms	9.19.29.310.1

Weakness: CWE-444 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

https://www.ibm.com/support/pages/node/7281750 vendor-advisory, patch