FlowiseAI Flowise up to 3.0.x DocumentStore Creation Endpoint repository.save access control

Summaryinfo

A vulnerability categorized as critical has been discovered in FlowiseAI Flowise up to 3.0.x. This issue affects the function repository.save of the component DocumentStore Creation Endpoint. The manipulation results in access control. This vulnerability is known as CVE-2026-41277. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in FlowiseAI Flowise up to 3.0.x. Affected is the function repository.save of the component DocumentStore Creation Endpoint. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, a Mass Assignment vulnerability in the DocumentStore creation endpoint allows authenticated users to control the primary key (id) and internal state fields of DocumentStore entities. Because the service uses repository.save() with a client-supplied primary key, the POST create endpoint behaves as an implicit UPSERT operation. This enables overwriting existing DocumentStore objects. In multi-workspace or multi-tenant deployments, this can lead to cross-workspace object takeover and broken object-level authorization (IDOR), allowing an attacker to reassign or modify DocumentStore objects belonging to other workspaces. This vulnerability is fixed in 3.1.0.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-41277 since 04/18/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 3.1.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-25296) and CERT Bund (WID-SEC-2026-1145). Once again VulDB remains the best source for vulnerability data.

Affected

• Open Source Flowise

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Vendor

• FlowiseAI

Name

• Flowise

Version

• 3.0

Website

• Product: https://github.com/FlowiseAI/Flowise/

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Once again VulDB remains the best source for vulnerability data.

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