CVE-2026-41277: Flowise mass assignment in DocumentStore endpoint allows overwriting objects

Summary

CVE-2026-41277 is a Mass Assignment flaw in the DocumentStore creation endpoint of Flowise, a drag-and-drop UI for building LLM flows, affecting versions prior to 3.1.0. Authenticated users can set the primary key (id) and internal state fields, so the repository.save() call acts as an implicit UPSERT that overwrites existing DocumentStore objects. In multi-workspace or multi-tenant deployments, this enables cross-workspace object takeover and IDOR, letting an attacker reassign or modify DocumentStore objects belonging to other workspaces.

Mitigation

Fixed in 3.1.0.

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

• flowisenpmLLM dependency since 2024-03-12

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