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

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.1 · CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

EPSS

• CVE-2026-41271: 0.23% estimated exploitation activity in the next 30 days; percentile 14.24 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary 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. Details The vulnerability is located in FlowiseAI's API Chain implementation where user-controlled input is used to dynamically generate URLs and request parameters without proper validation. The attack works as follows: 1. Dynamic API Generation: Flowise's POST/GET API chains use LLM-generated prompts based on user queries and API documentation to construct HTTP requests 2. Unvalidated URL Construction: The system extracts URL and data parameters directly from LLM responses without validating against the intended API…

Published by the source

16 Apr 2026, 21:52 UTC

Last modified by the source

5 May 2026, 16:11 UTC

Source last checked

26 Oct 2026, 12:50 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-6r77-hqx7-7vw8

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-6r77-hqx7-7vw8

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# Patch Next advisory brief: CVE-2026-41271

Advisory: Flowise: APIChain Prompt Injection SSRF in GET/POST API Chains
IDs: CVE-2026-41271, GHSA-6r77-hqx7-7vw8
Record: https://patchnext.com/advisories/cve-2026-41271 (revision 2, source checked 26 Oct 2026, 12:50 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: flowise-components 3.1.0; flowise 3.1.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm flowise-components: affected <= 3.0.13; fixed in 3.1.0
- npm flowise: affected <= 3.0.13; fixed in 3.1.0

## Suggested inspection (read-only)
- `npm ls flowise-components --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.
- `npm ls flowise --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on flowise-components, flowise.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-6r77-hqx7-7vw8 (OSV record GHSA-6r77-hqx7-7vw8 lists affected ranges: npm flowise >=0 =0 <3.1.0 (fixed))
- Verified: https://github.com/advisories/GHSA-6r77-hqx7-7vw8 (GitHub-reviewed advisory GHSA-6r77-hqx7-7vw8 lists affected ranges: npm flowise >=0 =0 <=3.0.13)

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