Flowise SSRF Vulnerability Exposes Internal Systems
The National Vulnerability Database has detailed a critical Server-Side Request Forgery (SSRF) vulnerability, CVE-2026-41271, affecting FlowiseAI versions prior to 3.1.0. This flaw resides in the POST/GET API Chain components, allowing unauthenticated attackers to compel the Flowise server into making arbitrary HTTP requests. Attackers can exploit this by injecting malicious prompt templates, bypassing intended API constraints to target sensitive internal services. This opens the door for reconnaissance and potential data exfiltration within an organization’s network.
The National Vulnerability Database highlights that this vulnerability, rated HIGH with a CVSS score of 7.1, is fixed in FlowiseAI version 3.1.0. The attack vector is network-based, requires low privileges, and has a high complexity to exploit, but leads to significant confidentiality and integrity impacts. Defenders should prioritize upgrading FlowiseAI instances to the patched version immediately to mitigate this risk.
What This Means For You
- If your organization uses FlowiseAI, you must upgrade to version 3.1.0 or later immediately. This SSRF vulnerability allows unauthenticated attackers to probe your internal network and potentially exfiltrate data by forcing the Flowise server to make requests to internal services. Audit your Flowise instances for any signs of unauthorized network activity.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-41271 - Flowise SSRF via API Chain Components
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-41271 | Vulnerability | CVE-2026-41271 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 23, 2026 at 23:16 UTC |
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