# CVE-2026-46440: Flowise: Basic Auth Credentials Exposed via API

> Attackers can expose basic authentication credentials via the API due to plaintext validation and lack of rate limiting in Flowise.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 8 Jun 2026
- **Updated:** 8 Jun 2026
- **Also known as:** GHSA-php6-83fg-gw3g

## What is CVE-2026-46440?

CVE-2026-46440 is a high-severity vulnerability in Flowiseai Flowise, published on 8 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, the checkBasicAuth endpoint validates credentials in plaintext without rate limiting and with direct comparison. This issue has been patched in version 3.1.2.

Weakness: CWE-522 (Insufficiently Protected Credentials)

## Which versions are affected by CVE-2026-46440?

2 open source packages ship an affected version, including flowise. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `flowise` | npm | All versions | 3.1.2 |
| `flowise` | npm | All versions | 3.1.2 |

Products: Flowiseai Flowise.

## How do I fix CVE-2026-46440?

Upgrade flowise to 3.1.2 or later.

## Is CVE-2026-46440 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46440 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-2026-46440 and fix it if it is affected.

What it is: CVE-2026-46440 is a high-severity vulnerability in Flowiseai Flowise, published on 8 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46440 exists.

Affected packages and fixed versions:
- flowise (npm): affected all versions; fixed in 3.1.2
- flowise (npm): affected all versions; fixed in 3.1.2

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-2026-46440/ (Markdown: https://insights.sbomify.com/CVE-2026-46440/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-46440
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-46440
- OSV: https://osv.dev/vulnerability/CVE-2026-46440

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-46440/
Summaries are generated and may contain mistakes; the official description above is the record.