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01 Record

CVE-2026-11541

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

HighPUBLISHEDCNA: ibm
CNA base score7.4 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

02 Description

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

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.41% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 35.7% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-10-25.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-06-30 20:56Z4 MO AGO
Last updated
2026-07-29 18:12Z3 MO AGO
Reserved
2026-06-08
Assigning CNA
ibm
Record state
PUBLISHED
Severity
High (CVSS 7.4)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
  • CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')Base
Data version
5.2
Document digest
c17a2ca6cdd2933f379c7d0f50a9abf3f7f3790bf48a95aafecb8edcb56bda69

05 Affected products

VendorProductVersionsPlatforms

06 References

07 Remediation

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