CVE-2026-41271

Flowise: APIChain Prompt Injection SSRF in GET/POST API Chains

State: Published
Severity: 7.1 High
Published: Apr 23, 2026
Updated: Apr 23, 2026
Reserved: Apr 18, 2026

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) vulnerability exists in FlowiseAI's POST/GET API Chain components that allows unauthenticated attackers to force the server to make arbitrary HTTP requests to internal and external systems. By injecting malicious prompt templates, attackers can bypass the intended API documentation constraints and redirect requests to sensitive internal services, potentially leading to internal network reconnaissance and data exfiltration. This vulnerability is fixed in 3.1.0.

Scores

CVSS	Score	Vector	Source
3.0	7.1 High	CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L	GitHub_M

Weaknesses

CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
FlowiseFlowiseAI	< 3.1.0Affected
flowise-componentsFlowiseAI	< 3.1.0Affected

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-6r77-hqx7-7vw8

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