FlowiseAI Flowise up to 3.1.4 download chatflowId/chatId/fileName improper authorization

Summaryinfo

A vulnerability identified as problematic has been detected in FlowiseAI Flowise up to 3.1.4. This affects an unknown part of the file /api/v1/openai-assistants-file/download. The manipulation of the argument chatflowId/chatId/fileName leads to improper authorization. This vulnerability is documented as CVE-2026-71962. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in FlowiseAI Flowise up to 3.1.4 and classified as problematic. This issue affects some unknown functionality of the file /api/v1/openai-assistants-file/download. The manipulation of the argument chatflowId/chatId/fileName with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. The summary by CVE is:

Flowise versions 2.2.4 through 3.1.4 contain a missing authorization vulnerability in the POST /api/v1/openai-assistants-file/download endpoint that allows unauthenticated attackers to access private files by exploiting the endpoint's inclusion in the global authentication whitelist, which bypasses all session and API key verification. Attackers can supply valid chatflowId, chatId, and fileName identifiers to retrieve files from any chatflow on the instance, including private chatflows belonging to other workspaces or organizations.

It is possible to read the advisory at gist.github.com. The identification of this vulnerability is CVE-2026-71962 since 08/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/10/2026). The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-55702). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• FlowiseAI

Name

• Flowise

Version

• 3.1.0
• 3.1.1
• 3.1.2
• 3.1.3
• 3.1.4

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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