FlowiseAI Flowise up to 3.0.12 OpenAPI Toolkit OpenAPIToolkit.ts loadOpenApiSpec server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in FlowiseAI Flowise up to 3.0.12. The affected element is the function loadOpenApiSpec of the file packages/components/nodes/tools/OpenAPIToolkit/OpenAPIToolkit.ts of the component OpenAPI Toolkit. This manipulation causes server-side request forgery. The identification of this vulnerability is CVE-2026-43995. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in FlowiseAI Flowise up to 3.0.12. Affected by this vulnerability is the function loadOpenApiSpec of the file packages/components/nodes/tools/OpenAPIToolkit/OpenAPIToolkit.ts of the component OpenAPI Toolkit. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, multiple tool implementations directly import and invoke raw HTTP clients (node-fetch, axios) instead of using the secured wrapper. These tools include (1) OpenAPIToolkit/OpenAPIToolkit.ts, (2) WebScraperTool/WebScraperTool.ts, (3) MCP/core.ts, and (4) Arxiv/core.ts. This vulnerability is fixed in 3.1.0.

It is possible to read the advisory at gist.github.com. This vulnerability is known as CVE-2026-43995. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known.

It is possible to download the exploit at gist.github.com. It is declared as proof-of-concept.

Upgrading to version 3.1.0 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Flowise 3.1.0

Timelineinfo

05/06/2026 Advisory disclosed
05/06/2026 +0 days VulDB entry created
05/21/2026 +15 days VulDB entry last update

Sourcesinfo

Advisory: gist.github.com
Status: Confirmed

CVE: CVE-2026-43995 (🔒)
GCVE (CVE): GCVE-0-2026-43995
GCVE (VulDB): GCVE-100-361279
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/06/2026 09:48
Updated: 05/21/2026 03:54
Changes: 05/06/2026 09:48 (57), 05/21/2026 03:54 (24)
Complete: 🔍
Submitter: Eric-a
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #777668: FlowiseAI Flowise <= 3.0.12 Server-Side Request Forgery (CWE-918) (by Eric-a)

Be aware that VulDB is the high quality source for vulnerability data.

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