CVE-2026-41270: CWE-284: Improper Access Control in FlowiseAI Flowise
Flowise versions prior to 3. 1. 0 contain a Server-Side Request Forgery (SSRF) protection bypass vulnerability in the Custom Function feature. The application attempts to block SSRF via HTTP_DENY_LIST for axios and node-fetch libraries, but does not apply equivalent protections to Node. js http, https, and net modules used in the NodeVM sandbox. This allows authenticated users to bypass SSRF protections and potentially access internal network resources such as cloud provider metadata services. The vulnerability is fixed in version 3. 1. 0. The CVSS score is 7.
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 flaw 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 within the NodeVM sandbox environment. This allows authenticated users to bypass SSRF restrictions and make unauthorized requests to internal network resources, including sensitive endpoints like cloud metadata services. The vulnerability is resolved in Flowise version 3.1.0.
Potential Impact
Exploitation of this vulnerability allows authenticated users to bypass SSRF protections and access internal network resources that should be restricted, such as cloud provider metadata services. This can lead to unauthorized disclosure of sensitive information and potentially further compromise of the internal environment. The CVSS score of 7.1 reflects a high impact on confidentiality and integrity with limited availability impact.
Mitigation Recommendations
A fix for this vulnerability is available in Flowise version 3.1.0. Users should upgrade to version 3.1.0 or later to remediate this issue. No other vendor advisory or patch information is provided, so patch status beyond this version upgrade is not confirmed. Until upgraded, restrict authenticated user access to the Custom Function feature if possible.
CVE-2026-41270: CWE-284: Improper Access Control in FlowiseAI Flowise
Description
Flowise versions prior to 3. 1. 0 contain a Server-Side Request Forgery (SSRF) protection bypass vulnerability in the Custom Function feature. The application attempts to block SSRF via HTTP_DENY_LIST for axios and node-fetch libraries, but does not apply equivalent protections to Node. js http, https, and net modules used in the NodeVM sandbox. This allows authenticated users to bypass SSRF protections and potentially access internal network resources such as cloud provider metadata services. The vulnerability is fixed in version 3. 1. 0. The CVSS score is 7.
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 flaw 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 within the NodeVM sandbox environment. This allows authenticated users to bypass SSRF restrictions and make unauthorized requests to internal network resources, including sensitive endpoints like cloud metadata services. The vulnerability is resolved in Flowise version 3.1.0.
Potential Impact
Exploitation of this vulnerability allows authenticated users to bypass SSRF protections and access internal network resources that should be restricted, such as cloud provider metadata services. This can lead to unauthorized disclosure of sensitive information and potentially further compromise of the internal environment. The CVSS score of 7.1 reflects a high impact on confidentiality and integrity with limited availability impact.
Mitigation Recommendations
A fix for this vulnerability is available in Flowise version 3.1.0. Users should upgrade to version 3.1.0 or later to remediate this issue. No other vendor advisory or patch information is provided, so patch status beyond this version upgrade is not confirmed. Until upgraded, restrict authenticated user access to the Custom Function feature if possible.
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: 4/23/2026, 8:06:31 PM
Last updated: 4/23/2026, 8:59:34 PM
Views: 6
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.