CVE-2026-41271 Flowise: APIChain Prompt Injection SSRF in GET/POST API Chains
Unauthenticated attackers can exploit prompt injection in API chains to perform Server-Side Request Forgery, enabling internal network reconnaissance and data exfiltration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41271?
CVE-2026-41271 is a high-severity server-side request forgery vulnerability in Flowiseai Flowise, published on 23 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2026-41271?
4 open source packages ship an affected version, including flowise and flowise-components. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
flowise npm | All versions | 3.1.0 |
flowise npm | All versions | 3.1.0 |
flowise-components npm | All versions | 3.1.0 |
flowise-components npm | All versions | 3.1.0 |
Products include Flowiseai Flowise.
How do I fix CVE-2026-41271?
Upgrade flowise to 3.1.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-41271 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41271 exists.
Other vulnerabilities in Flowiseai Flowise
- CVE-2025-71338 Flowise through 2.2.7 - Arbitrary File Write to Remote Code Execution via document-store API
- CVE-2026-40933 Flowise: Authenticated RCE Via MCP Adapters
- CVE-2025-61913 Flowise is vulnerable to arbitrary file read, arbitrary file write
- CVE-2025-59528 Flowise has Remote Code Execution vulnerability
- CVE-2026-52098 Code injection in n/a
Sources
Also known as GHSA-6r77-hqx7-7vw8.