Inconsistent Interpretation of HTTP Requests in CICS Transaction Gateway for Multiplatforms.

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-11541
StatePUBLISHED
Assigneribm
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-30 22:16:46 UTC
Updated2026-07-29 19:16:43 UTC
DescriptionIBM 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.004180000 probability, percentile 0.335970000 (date 2026-07-04)

Problem Types: CWE-444 | CWE-444 CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNACVSS7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Ibm Websphere Application Server All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA IBM CICS Transaction Gateway For Multiplatforms affected 9.1 Not specified
CNA IBM CICS Transaction Gateway For Multiplatforms affected 9.2 Not specified
CNA IBM CICS Transaction Gateway For Multiplatforms affected 9.3 Not specified
CNA IBM CICS Transaction Gateway For Multiplatforms affected 10.1 Not specified

References

ReferenceSourceLinkTags
www.ibm.com/support/pages/node/7281750 [email protected] www.ibm.com
www.ibm.com/support/pages/node/7277550 MITRE www.ibm.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: IBM strongly recommends addressing the vulnerabilities now by downloading and applying the CICS Transaction Gateway for Multiplatforms fixes. Product VRMF APAR Remediation/First Fix CICS Transaction Gateway for Multiplatforms9.1.0.0 - PSIRT fixes for CICS Transaction Gateway for Multiplatforms will be provided only to customers covered by Extended Support and only upon request through an IBM Support case. CICS Transaction Gateway for Multiplatforms9.2.0.0 PH72094 AIX Link https://www.ibm.com/support/fixcentral/quickorder pLinux Big Endian Link https://www.ibm.com/support/fixcentral/quickorder Windows Link https://www.ibm.com/support/fixcentral/quickorder iLinux Link https://www.ibm.com/support/fixcentral/quickorder zLinux Link https://www.ibm.com/support/fixcentral/quickorder CICS Transaction Gateway for Multiplatforms9.3.0.0 PH72094 AIX Link https://www.ibm.com/support/fixcentral/quickorder pLinux Little Endian Link https://www.ibm.com/support/fixcentral/quickorder pLinux Big Endian Link https://www.ibm.com/support/fixcentral/quickorder Windows Link https://www.ibm.com/support/fixcentral/quickorder iLinux Link https://www.ibm.com/support/fixcentral/quickorder zLinux Link https://www.ibm.com/support/fixcentral/quickorder x86 Container Link https://www.ibm.com/support/fixcentral/quickorder 390x Container Link https://www.ibm.com/support/fixcentral/quickorder CICS Transaction Gateway for Multiplatforms10.1.0.0 PH72095 AIX Link https://www.ibm.com/support/fixcentral/quickorder pLinux Little Endian Link https://www.ibm.com/support/fixcentral/quickorder Windows Link https://www.ibm.com/support/fixcentral/quickorder iLinux Link https://www.ibm.com/support/fixcentral/quickorder zLinux Link https://www.ibm.com/support/fixcentral/quickorder x86 Container Link https://www.ibm.com/support/fixcentral/quickorder 390x Container Link https://www.ibm.com/support/fixcentral/quickorder

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