# CVE-2026-70476: Flowise broken access control in Stripe subscription endpoints

Source: https://junglewise.ai/threats/cve-2026-70476-flowise-broken-access-control-in-stripe-subscription-endpoints  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-04. Updated: 2026-08-04  
License: CC BY 4.0 with a link back

CVE-2026-70476 · Severity: high · CVSS 8.2 · Published 2026-08-04

Flowise, an open-source tool for building LLM applications, contains a flaw in how it handles billing and subscription updates. An attacker with a valid account can modify the Stripe subscription details of other organizations by providing a victim's subscription ID. This could lead to unauthorized charges, service downgrades, or financial disruption for affected customers.

Technologies: [flowise (npm)](https://junglewise.ai/threats/technologies/flowise). Vendors: [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is CVE-2026-70476 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-70476 being exploited in the wild.

**How severe is CVE-2026-70476?** High severity, with a CVSS score of 8.2, published 4 August 2026.

**Which products and versions are affected?** flowise (npm) <= 3.1.2, SEMVER:introduced=0,fixed=3.1.3.

**Is there a fix for CVE-2026-70476?** Yes. flowise (npm): upgrade to 3.1.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-70476 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-70476?** Check whether you run flowise (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- flowise (npm): upgrade to 3.1.3 or later

  ```sh
  npm install flowise@3.1.3
  ```


## Technical details

Flowise suffers from an Insecure Direct Object Reference (IDOR) / Broken Access Control vulnerability in the `update-additional-seats` and `update-subscription-plan` routes within `organization.route.ts`. The server accepts a `subscriptionId` directly from the request body and processes billing changes via the Stripe integration without verifying if the subscription belongs to the authenticated user's organization. An attacker can obtain a victim's `subscriptionId` through other API endpoints and then issue POST requests to modify seat quantities or change subscription plans. This issue is fixed in version 3.1.3.

## Affected products

- FlowiseAI flowise <= 3.1.2

## Identifiers

- CVE-2026-70476
- GHSA-gmmw-qg98-6j6p

## Timeline

- 2026-07-29: disclosed
- 2026-08-04: advisory
- 2026-08-04: patched

## References

- [https://api.github.com/users/berkdedekarginoglu](https://api.github.com/users/berkdedekarginoglu)
- [https://github.com/berkdedekarginoglu](https://github.com/berkdedekarginoglu)
- [https://api.github.com/users/berkdedekarginoglu/gists%7B/gist_id%7D](https://api.github.com/users/berkdedekarginoglu/gists%7B/gist_id%7D)
- [https://api.github.com/users/berkdedekarginoglu/repos](https://api.github.com/users/berkdedekarginoglu/repos)
- [https://avatars.githubusercontent.com/u/30373481?v=4](https://avatars.githubusercontent.com/u/30373481?v=4)
- [https://api.github.com/users/berkdedekarginoglu/events%7B/privacy%7D](https://api.github.com/users/berkdedekarginoglu/events%7B/privacy%7D)

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- [Duplicate Advisory: Flowise contains an unauthenticated sandbox escape](https://junglewise.ai/threats/duplicate-advisory-flowise-contains-an-unauthenticated-sandbox-escape-8959e167)
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