# CVE-2026-33053: Langflow IDOR in API key deletion endpoint

Source: https://junglewise.ai/threats/cve-2026-33053-langflow-idor-in-api-key-deletion-endpoint  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-18. Updated: 2026-06-06  
License: CC BY 4.0 with a link back

CVE-2026-33053 · Severity: high · CVSS 4 · Published 2026-03-18

Langflow, a tool for building AI applications, contains a security flaw that allows any logged-in user to delete the API keys of other users. By guessing or discovering the unique ID of another user's API key, an attacker can disable their integrations and disrupt their services. This could lead to significant operational downtime and unauthorized service interruptions for affected organizations.

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

## Quick answers

**Is CVE-2026-33053 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33053 being exploited in the wild.

**How severe is CVE-2026-33053?** High severity, with a CVSS score of 4, published 18 March 2026.

**Which products and versions are affected?** langflow (PyPI) ECOSYSTEM:introduced=0,fixed=1.9.0.

**Is there a fix for CVE-2026-33053?** Yes. langflow (PyPI): upgrade to 1.9.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-33053 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-33053?** Check whether you run langflow (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 1.9.0 or later

  ```sh
  pip install "langflow>=1.9.0"
  ```


## Technical details

An Insecure Direct Object Reference (IDOR) vulnerability exists in the `delete_api_key_route` endpoint within `src/backend/base/langflow/api/v1/api_key.py`. The endpoint accepts an `api_key_id` (UUID) and performs a generic authentication check but fails to verify if the authenticated user owns the specific key being deleted. An attacker with a valid account can exploit this by sending a DELETE request with a targeted `api_key_id`, leading to unauthorized deletion of credentials. This issue was addressed in version 1.9.0 by ensuring the `current_user` is passed to the CRUD function to verify ownership before proceeding with the deletion.

## Affected products

- langflow-ai langflow < 1.9.0

## Identifiers

- CVE-2026-33053
- GHSA-rf6x-r45m-xv3w
- PYSEC-2026-78

## Timeline

- 2026-03-16: disclosed
- 2026-03-18: advisory: GitHub Advisory published
- 2026-03-20: other: NVD published

## References

- [https://api.github.com/users/FaizanKolega](https://api.github.com/users/FaizanKolega)
- [https://github.com/FaizanKolega](https://github.com/FaizanKolega)
- [https://api.github.com/users/FaizanKolega/gists%7B/gist_id%7D](https://api.github.com/users/FaizanKolega/gists%7B/gist_id%7D)
- [https://api.github.com/users/FaizanKolega/repos](https://api.github.com/users/FaizanKolega/repos)
- [https://avatars.githubusercontent.com/u/171814809?v=4](https://avatars.githubusercontent.com/u/171814809?v=4)
- [https://api.github.com/users/FaizanKolega/events%7B/privacy%7D](https://api.github.com/users/FaizanKolega/events%7B/privacy%7D)

## 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)