# CVE-2026-41277

> Vulnerability · severity: **HIGH** (CVSS 8.8).

## Description

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.

## Key facts

- **CVE ID:** CVE-2026-41277
- **Published:** 2026-04-23
- **CVSS severity:** HIGH
- **CVSS base score:** 8.8
- **CWE codes:** CWE-284, CWE-639, CWE-915

## Affected products

- `flowiseai:flowise`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41277

## Citation

> AI Analytics. CVE-2026-41277. Retrieved 2026-07-11 from https://api.ai-analytics.org/cve/CVE-2026-41277. Derived from NIST NVD. Licensed CC0.

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