# CVE-2026-67621: Flowise 3.1.4 Missing Authorization on Document Store Mutation Endpoints

> Authenticated users with view permissions can modify knowledge bases and consume API credits via unprotected document store endpoints.

- **Severity:** High 7.2 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Aug 2026
- **Updated:** 14 Aug 2026
- **Also known as:** GHSA-7q53-9j99-gg5c

## What is CVE-2026-67621?

CVE-2026-67621 is a high-severity missing authorization vulnerability in Flowiseai Flowise, published on 6 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Flowise through 3.1.4 contains a missing authorization vulnerability that allows authenticated workspace members to perform unauthorized document store operations by accessing unprotected mutation endpoints. Attackers holding only view-level permissions can send direct HTTP requests to the upsert and refresh document store routes to trigger document ingestion, refresh vector database contents, consume embedding API credits, and modify knowledge bases used by downstream chatflows.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-67621?

It affects 1 product.


Products: Flowiseai Flowise.

## How do I fix CVE-2026-67621?

No fix has been published for CVE-2026-67621 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-67621 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67621 exists.

## Other vulnerabilities in Flowiseai Flowise

- [CVE-2025-71338](https://insights.sbomify.com/CVE-2025-71338/): Flowise through 2.2.7 - Arbitrary File Write to Remote Code Execution via document-store API (critical 10.0)
- [CVE-2026-40933](https://insights.sbomify.com/CVE-2026-40933/): Flowise: Authenticated RCE Via MCP Adapters (critical 10.0)
- [CVE-2025-61913](https://insights.sbomify.com/CVE-2025-61913/): Flowise is vulnerable to arbitrary file read, arbitrary file write (critical 10.0)
- [CVE-2025-59528](https://insights.sbomify.com/CVE-2025-59528/): Flowise has Remote Code Execution vulnerability (critical 10.0)
- [CVE-2026-52098](https://insights.sbomify.com/CVE-2026-52098/): Code injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-67621 and fix it if it is affected.

What it is: CVE-2026-67621 is a high-severity missing authorization vulnerability in Flowiseai Flowise, published on 6 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67621 exists.

Affected product: Flowiseai Flowise. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-67621/ (Markdown: https://insights.sbomify.com/CVE-2026-67621/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-67621
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-67621
- OSV: https://osv.dev/vulnerability/CVE-2026-67621

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-67621/
Summaries are generated and may contain mistakes; the official description above is the record.