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CVE-2026-1577— IBM® Db2® is vulnerable to a denial of service with a specially crafted query involving multiple subqueries

Quick assessment

Affected
IBM Db2
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 Db2是美国国际商业机器（IBM）公司的一套关系型数据库管理系统。 IBM Db2 11.5.0版本至11.5.9版本和12.1.0版本至12.1.4版本存在安全漏洞，该漏洞源于数据查询逻辑中对特殊元素的中和不当，可能导致认证用户造成拒绝服务。

CVSS 6.5 · Medium EPSS 0.34% · P27

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 2

VendorProduct Version RangeStatus
IBM Db2 11.5.0≤ 11.5.9 affected
12.1.0≤ 12.1.4 affected
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I. Basic Information for CVE-2026-1577

Vulnerability Information
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Vulnerability Title
IBM® Db2® is vulnerable to a denial of service with a specially crafted query involving multiple subqueries
Source: CVE Program / CVE List V5
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 data query logic.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
IBM Db2 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM Db2是美国国际商业机器（IBM）公司的一套关系型数据库管理系统。 IBM Db2 11.5.0版本至11.5.9版本和12.1.0版本至12.1.4版本存在安全漏洞，该漏洞源于数据查询逻辑中对特殊元素的中和不当，可能导致认证用户造成拒绝服务。
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

Vendor Product Affected Versions CPE Subscribe
IBM Db2 11.5.0 ~ 11.5.9 cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-1577

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III. Intelligence Information for CVE-2026-1577

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Vendor Advisories for CVE-2026-1577 (1)

Same Patch Batch · IBM · 2026-04-30 · 14 CVEs total

CVE-2026-6389 8.8 HIGH IBM Turbonomic Prometurbo agent used by IBM Turbonomic Application Resource Management is
CVE-2026-6543 8.8 HIGH Authenticated Remote Code Execution Vulnerability in Langflow Code Validation Endpoint
CVE-2026-4503 7.5 HIGH Unauthenticated Insecure Direct Object Reference (IDOR) Vulnerability in Langflow Desktop
CVE-2025-36122 6.5 MEDIUM IBM® Db2® is vulnerable to a denial of service with a specially crafted query when stmthea
CVE-2026-6542 6.5 MEDIUM Monitor API allows cross-user read of transaction logs and deletion of build data via flow
CVE-2026-3345 6.5 MEDIUM Path Traversal and Arbitrary File Write Vulnerability in IBM Langflow Desktop API v2 File
CVE-2026-3340 6.5 MEDIUM Server-Side Request Forgery (SSRF) in Langflow URL Component
CVE-2026-4502 6.5 MEDIUM Arbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API
CVE-2026-2311 6.4 MEDIUM IBM i is affected by a privilege escalation vulnerability in Web Administration GUI []
CVE-2026-3346 6.4 MEDIUM Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw
CVE-2025-36335 6.2 MEDIUM Vulnerabilities found
CVE-2025-14688 5.3 MEDIUM IBM® Db2® is vulnerable to a denial of service when fetching from certain tables under spe
CVE-2025-36180 5.3 MEDIUM Inadequate Pod Communication Restrictions, affects watsonx.data

IV. Related Vulnerabilities

Same product: Db2
Same vendor: IBM

V. Comments for CVE-2026-1577

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