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CVE-2026-3346— Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw

Quick assessment

Affected
IBM Langflow Desktop
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 Langflow Desktop是美国国际商业机器（IBM）公司的一款AI流程编排桌面应用。 IBM Langflow Desktop 1.6.0版本至1.8.4版本存在SQL注入漏洞，该漏洞源于存储型跨站脚本，可能导致认证用户嵌入任意JavaScript代码，进而导致凭据泄露。

CVSS 6.4 · Medium EPSS 0.16% · P5

Affected Version Matrix 1

VendorProduct Version RangeStatus
IBM Langflow Desktop 1.6.0≤ 1.8.4 affected
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I. Basic Information for CVE-2026-3346

Vulnerability Information
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Vulnerability Title
Stored Cross-Site Scripting (XSS) in Langflow Markdown Rendering via rehypeRaw
Source: CVE Program / CVE List V5
Vulnerability Description
IBM Langflow Desktop 1.6.0 through 1.8.4 Lanflow is vulnerable to stored cross-site scripting. This vulnerability allows an authenticated user to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
IBM Langflow Desktop SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM Langflow Desktop是美国国际商业机器（IBM）公司的一款AI流程编排桌面应用。 IBM Langflow Desktop 1.6.0版本至1.8.4版本存在SQL注入漏洞，该漏洞源于存储型跨站脚本，可能导致认证用户嵌入任意JavaScript代码，进而导致凭据泄露。
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 Langflow Desktop 1.6.0 ~ 1.8.4 cpe:2.3:a:ibm:langflow_desktop:1.6.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-3346

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III. Intelligence Information for CVE-2026-3346

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Vendor Advisories for CVE-2026-3346 (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-2026-1577 6.5 MEDIUM IBM® Db2® is vulnerable to a denial of service with a specially crafted query involving mu
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-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: Langflow Desktop
Same vendor: IBM
Same weakness: CWE-89

V. Comments for CVE-2026-3346

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