CVE-2026-41270: CWE-284: Improper Access Control in FlowiseAI Flowise
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, a Server-Side Request Forgery (SSRF) protection bypass vulnerability exists in the Custom Function feature. While the application implements SSRF protection via HTTP_DENY_LIST for axios and node-fetch libraries, the built-in Node.js http, https, and net modules are allowed in the NodeVM sandbox without equivalent protection. This allows authenticated users to bypass SSRF controls and access internal network resources (e.g., cloud provider metadata services) This vulnerability is fixed in 3.1.0.
AI Analysis
Technical Summary
CVE-2026-41270 is an improper access control vulnerability (CWE-284) in FlowiseAI's Flowise product before version 3.1.0. The issue arises because SSRF protections are implemented only for certain HTTP client libraries (axios and node-fetch) but not for the built-in Node.js http, https, and net modules used in the NodeVM sandbox environment. This gap allows authenticated users to bypass SSRF protections and make unauthorized requests to internal network resources, including sensitive endpoints like cloud metadata services. The vulnerability has a CVSS 3.1 score of 7.1 (high severity) and is addressed by updating to Flowise version 3.1.0.
Potential Impact
Exploitation of this vulnerability could allow an authenticated user to bypass SSRF protections and access internal network resources that should be restricted, such as cloud provider metadata services. This can lead to disclosure of sensitive information and potentially further compromise of the internal environment. The impact includes high confidentiality and integrity risks with a low impact on availability.
Mitigation Recommendations
A fix is available in Flowise version 3.1.0. Users should upgrade to version 3.1.0 or later to remediate this vulnerability. No alternative mitigations are indicated in the vendor advisory. Patch status is confirmed by the vendor stating the issue is fixed in 3.1.0.
CVE-2026-41270: CWE-284: Improper Access Control in FlowiseAI Flowise
Description
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, a Server-Side Request Forgery (SSRF) protection bypass vulnerability exists in the Custom Function feature. While the application implements SSRF protection via HTTP_DENY_LIST for axios and node-fetch libraries, the built-in Node.js http, https, and net modules are allowed in the NodeVM sandbox without equivalent protection. This allows authenticated users to bypass SSRF controls and access internal network resources (e.g., cloud provider metadata services) This vulnerability is fixed in 3.1.0.
CVSS v3.1
Score 7.1high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-41270 is an improper access control vulnerability (CWE-284) in FlowiseAI's Flowise product before version 3.1.0. The issue arises because SSRF protections are implemented only for certain HTTP client libraries (axios and node-fetch) but not for the built-in Node.js http, https, and net modules used in the NodeVM sandbox environment. This gap allows authenticated users to bypass SSRF protections and make unauthorized requests to internal network resources, including sensitive endpoints like cloud metadata services. The vulnerability has a CVSS 3.1 score of 7.1 (high severity) and is addressed by updating to Flowise version 3.1.0.
Potential Impact
Exploitation of this vulnerability could allow an authenticated user to bypass SSRF protections and access internal network resources that should be restricted, such as cloud provider metadata services. This can lead to disclosure of sensitive information and potentially further compromise of the internal environment. The impact includes high confidentiality and integrity risks with a low impact on availability.
Mitigation Recommendations
A fix is available in Flowise version 3.1.0. Users should upgrade to version 3.1.0 or later to remediate this vulnerability. No alternative mitigations are indicated in the vendor advisory. Patch status is confirmed by the vendor stating the issue is fixed in 3.1.0.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-18T14:01:46.801Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69ea782987115cfb6850f831
Added to database: 4/23/2026, 7:51:05 PM
Last enriched: 5/1/2026, 8:40:33 PM
Last updated: 6/5/2026, 7:57:14 PM
Views: 91
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