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

Quick assessment

Affected
IBM CICS Transaction Gateway for Multiplatforms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IBM websphere application server是美国IBM公司的一个Web应用执行环境。 IBM WebSphere Application Server存在输入验证错误漏洞，该漏洞源于HTTP请求走私问题，可能导致攻击者未经身份验证通过网络访问造成数据泄露和篡改。

CVSS 7.4 · High EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

VendorProduct Version RangeStatus
IBM CICS Transaction Gateway for Multiplatforms 9.1 affected
9.2 affected
9.3 affected
10.1 affected
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I. Basic Information for CVE-2026-11541

Vulnerability Information
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Vulnerability Title
Inconsistent Interpretation of HTTP Requests in CICS Transaction Gateway for Multiplatforms.
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
IBM WebSphere Application Server 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM websphere application server是美国IBM公司的一个Web应用执行环境。 IBM WebSphere Application Server存在输入验证错误漏洞，该漏洞源于HTTP请求走私问题，可能导致攻击者未经身份验证通过网络访问造成数据泄露和篡改。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM CICS Transaction Gateway for Multiplatforms 9.1 -

II. Public POCs for CVE-2026-11541

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III. Intelligence Information for CVE-2026-11541

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Vendor Advisories for CVE-2026-11541 (2)

Same Patch Batch · IBM · 2026-06-30 · 43 CVEs total

CVE-2026-10134 10.0 CRITICAL Unauthenticated Server-Side RCE via PythonCodeStructuredTool in Public Flows
CVE-2026-7873 9.9 CRITICAL Code Injection Vulnerability in Code Validation Endpoint
CVE-2026-7871 9.8 CRITICAL Insecure Deserialization in Redis Cache Backend
CVE-2026-7803 9.8 CRITICAL Flow Validation Bypass via Empty Component Type Field
CVE-2026-10109 9.8 CRITICAL IBM® Db2® is vulnerable to remote code execution due to improper pre-auth DRDA handshake h
CVE-2026-10140 9.6 CRITICAL Cross-Tenant API Key Reuse and Billing Fraud in Langflow Voice Mode Subsystem
CVE-2026-11708 9.3 CRITICAL IBM WebSphere Application Server is affected by a cross-site scripting vulnerability
CVE-2026-11712 9.3 CRITICAL IBM WebSphere Application Server is affected by a cross-site scripting vulnerability
CVE-2026-7874 9.1 CRITICAL Weak Cryptographic Key Derivation Exposed All Stored Credentials
CVE-2026-7663 9.1 CRITICAL Unauthenticated Cross-User MCP Resource Access and Tool Execution via Streamable Transport
CVE-2026-11594 8.5 HIGH IBM WebSphere Application Server is affected by multiple cross-site scripting vulnerabilit
CVE-2026-10129 8.5 HIGH SSRF via HTTP Redirect Following in Langflow API Request Component
CVE-2026-11714 8.5 HIGH IBM WebSphere Application Server Liberty is affected by an authorization bypass vulnerabil
CVE-2026-10560 8.2 HIGH Unauthenticated Access to Private Flow Build Events and Cancellation in Langflow OSS
CVE-2026-10564 8.2 HIGH SSRF Vulnerability in Langflow OSS Legacy Components Bypasses Protection
CVE-2025-36359 8.1 HIGH IBM DevOps Loop is susceptible to an Insufficient Session Expiration vulnerability.
CVE-2026-13449 7.6 HIGH XXE attack in IBM Business Automation Manager Open Editions
CVE-2026-13759 7.5 HIGH IBM WebSphere eXtreme Scale is affected by Insecure Deserilization
CVE-2026-13772 7.5 HIGH IBM WebSphere eXtreme Scale's OQL is affected by remote code execution
CVE-2026-11806 7.2 HIGH IBM WebSphere Application Server Liberty is affected by a an arbitrary file read vulnerabi

Showing top 20 of 43 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: CICS Transaction Gateway for Multiplatforms
Same vendor: IBM
Same weakness: CWE-444

V. Comments for CVE-2026-11541

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