# CVE-2026-21445: PYSEC-2026-2571 - Langflow Missing Authentication on Critical API Endpoints

Source: https://junglewise.ai/threats/cve-2026-21445-langflow-missing-authentication-on-critical-api-endpoints  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-13  
License: CC BY 4.0 with a link back

CVE-2026-21445 · Severity: medium · CVSS 4 · Published 2026-07-13

Langflow Missing Authentication on Critical API Endpoints

Technologies: [langflow (PyPI)](https://junglewise.ai/threats/technologies/pypi-langflow), [langflow-base (PyPI)](https://junglewise.ai/threats/technologies/langflow-base). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-21445 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21445 being exploited in the wild.

**How severe is CVE-2026-21445?** Medium severity, with a CVSS score of 4, published 13 July 2026.

**Which products and versions are affected?** langflow (PyPI) ECOSYSTEM:introduced=0,fixed=1.7.1; langflow-base (PyPI) ECOSYSTEM:introduced=0,fixed=0.7.1.

**Is there a fix for CVE-2026-21445?** Yes. langflow (PyPI): upgrade to 1.7.1 or later; langflow-base (PyPI): upgrade to 0.7.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-21445?** Check whether you run langflow (PyPI) or langflow-base (PyPI) 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

- langflow (PyPI): upgrade to 1.7.1 or later

  ```sh
  pip install "langflow>=1.7.1"
  ```

- langflow-base (PyPI): upgrade to 0.7.1 or later

  ```sh
  pip install "langflow-base>=0.7.1"
  ```


## Affected products

- langflow (PyPI) ECOSYSTEM:introduced=0,fixed=1.7.1
- langflow-base (PyPI) ECOSYSTEM:introduced=0,fixed=0.7.1

## Identifiers

- CVE-2026-21445
- GHSA-c5cp-vx83-jhqx
- PYSEC-2026-1524
- PYSEC-2026-2571

## Related threats

- [Langflow SSRF in URL-taking components](https://junglewise.ai/threats/langflow-ssrf-in-url-taking-components-protection-disabled-by-default-db7cac37)
- [Langflow IP spoofing in MCP configuration installation](https://junglewise.ai/threats/cve-2026-105741-langflow-is-a-tool-for-building-and-deploying-ai-powered-agents)
- [Langflow path traversal and cross-user disclosure in MCP resources](https://junglewise.ai/threats/cve-2026-105699-langflow-is-a-tool-for-building-and-deploying-ai-powered-agents)
- [Langflow authorization bypass in flow API endpoints](https://junglewise.ai/threats/cve-2026-105698-langflow-is-a-tool-for-building-and-deploying-ai-powered-agents)
- [Langflow MCP stdio command injection](https://junglewise.ai/threats/cve-2026-105697-langflow-is-a-tool-for-building-and-deploying-ai-powered-agents)