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CVE-2026-11906— IBM® Db2® federated server is vulnerable to a denial of service due to improper neutralization of special elements in the data query logic of XMLTable-derived columns by autheticated user

CVSS 6.5 · Medium EPSS 0.42% · P34

Possible ATT&CK Techniques 1AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProductVersion RangeStatus
IBMDb211.5.0≤ 11.5.9affected
12.1.0≤ 12.1.4affected
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I. Basic Information for CVE-2026-11906

Vulnerability Information
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Vulnerability Title
IBM® Db2® federated server is vulnerable to a denial of service due to improper neutralization of special elements in the data query logic of XMLTable-derived columns by autheticated user
Source: NVD (National Vulnerability Database)
Vulnerability Description
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in the data query logic of XMLTable-derived columns.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1284
Source: NVD (National Vulnerability Database)
Vulnerability Title
IBM DB2 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM DB2是美国IBM公司的一套关系型数据库管理系统。该系统的执行环境主要有UNIX、Linux、IBMi、z/OS以及Windows服务器版本。 IBM DB2 11.5.0版本至11.5.9版本和12.1.0版本至12.1.4版本存在输入验证错误漏洞，该漏洞源于在XMLTable派生列的数据查询逻辑中对特殊元素中和不当，可能导致经过身份验证的用户造成拒绝服务。
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

VendorProductAffected VersionsCPESubscribe
IBMDb2 11.5.0 ~ 11.5.9 cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-11906

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III. Intelligence Information for CVE-2026-11906

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Vendor Advisories for CVE-2026-11906 (1)

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

CVE-2026-1013410.0 CRITICALUnauthenticated Server-Side RCE via PythonCodeStructuredTool in Public Flows
CVE-2026-78739.9 CRITICALCode Injection Vulnerability in Code Validation Endpoint
CVE-2026-101099.8 CRITICALIBM® Db2® is vulnerable to remote code execution due to improper pre-auth DRDA handshake h
CVE-2026-78719.8 CRITICALInsecure Deserialization in Redis Cache Backend
CVE-2026-78039.8 CRITICALFlow Validation Bypass via Empty Component Type Field
CVE-2026-101409.6 CRITICALCross-Tenant API Key Reuse and Billing Fraud in Langflow Voice Mode Subsystem
CVE-2026-117089.3 CRITICALIBM WebSphere Application Server is affected by a cross-site scripting vulnerability
CVE-2026-117129.3 CRITICALIBM WebSphere Application Server is affected by a cross-site scripting vulnerability
CVE-2026-76639.1 CRITICALUnauthenticated Cross-User MCP Resource Access and Tool Execution via Streamable Transport
CVE-2026-78749.1 CRITICALWeak Cryptographic Key Derivation Exposed All Stored Credentials
CVE-2026-101298.5 HIGHSSRF via HTTP Redirect Following in Langflow API Request Component
CVE-2026-115948.5 HIGHIBM WebSphere Application Server is affected by multiple cross-site scripting vulnerabilit
CVE-2026-117148.5 HIGHIBM WebSphere Application Server Liberty is affected by an authorization bypass vulnerabil
CVE-2026-105648.2 HIGHSSRF Vulnerability in Langflow OSS Legacy Components Bypasses Protection
CVE-2026-105608.2 HIGHUnauthenticated Access to Private Flow Build Events and Cancellation in Langflow OSS
CVE-2025-363598.1 HIGHIBM DevOps Loop is susceptible to an Insufficient Session Expiration vulnerability.
CVE-2026-134497.6 HIGHXXE attack in IBM Business Automation Manager Open Editions
CVE-2026-137727.5 HIGHIBM WebSphere eXtreme Scale's OQL is affected by remote code execution
CVE-2026-137597.5 HIGHIBM WebSphere eXtreme Scale is affected by Insecure Deserilization
CVE-2026-115417.4 HIGHIBM WebSphere Application Server and WebSphere Application Server Liberty are affected by

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

IV. Related Vulnerabilities

Same product: Db2
Same vendor: IBM
Same weakness: CWE-1284

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