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CVE-2026-6542— Monitor API allows cross-user read of transaction logs and deletion of build data via flow_id

CVSS 6.5 · Medium EPSS 0.20% · P10

Affected Version Matrix 1

VendorProductVersion RangeStatus
IBMLangflow OSS1.0.0≤ 1.8.4affected
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I. Basic Information for CVE-2026-6542

Vulnerability Information
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Vulnerability Title
Monitor API allows cross-user read of transaction logs and deletion of build data via flow_id
Source: NVD (National Vulnerability Database)
Vulnerability Description
IBM Langflow OSS 1.0.0 through 1.8.4 could allow any user to supply a flow_id to read transaction logs and vertex build data belonging to other users, and to delete persisted vertex build data for another user's flow.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: NVD (National Vulnerability Database)
Vulnerability Title
IBM Langflow 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM Langflow是美国国际商业机器（IBM）公司的一个可视化流程编排工具。 IBM Langflow 1.0.0至1.8.4版本存在安全漏洞，该漏洞源于任何用户可提供flow_id读取其他用户的事务日志和顶点构建数据，并删除其他用户流程的持久化顶点构建数据。
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
IBMLangflow OSS 1.0.0 ~ 1.8.4 cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-6542

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III. Intelligence Information for CVE-2026-6542

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Vendor Advisories for CVE-2026-6542 (1)

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

CVE-2026-63898.8 HIGHIBM Turbonomic Prometurbo agent used by IBM Turbonomic Application Resource Management is
CVE-2026-65438.8 HIGHAuthenticated Remote Code Execution Vulnerability in Langflow Code Validation Endpoint
CVE-2026-45037.5 HIGHUnauthenticated Insecure Direct Object Reference (IDOR) Vulnerability in Langflow Desktop
CVE-2026-15776.5 MEDIUMIBM® Db2® is vulnerable to a denial of service with a specially crafted query involving mu
CVE-2025-361226.5 MEDIUMIBM® Db2® is vulnerable to a denial of service with a specially crafted query when stmthea
CVE-2026-33456.5 MEDIUMPath Traversal and Arbitrary File Write Vulnerability in IBM Langflow Desktop API v2 File
CVE-2026-33406.5 MEDIUMServer-Side Request Forgery (SSRF) in Langflow URL Component
CVE-2026-45026.5 MEDIUMArbitrary File Write and Remote Code Execution Vulnerability in Langflow v2 API
CVE-2026-23116.4 MEDIUMIBM i is affected by a privilege escalation vulnerability in Web Administration GUI []
CVE-2026-33466.4 MEDIUMStored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw
CVE-2025-363356.2 MEDIUMVulnerabilities found
CVE-2025-146885.3 MEDIUMIBM® Db2® is vulnerable to a denial of service when fetching from certain tables under spe
CVE-2025-361805.3 MEDIUMInadequate Pod Communication Restrictions, affects watsonx.data

IV. Related Vulnerabilities

Same product: Langflow OSS
Same vendor: IBM
Same weakness: CWE-639

V. Comments for CVE-2026-6542

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