# CVE-2026-71416

## Summary

- **CVE ID:** CVE-2026-71416
- **Severity:** HIGH
- **CVSS Score:** 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
- **CWE:** CWE-287, CWE-1385
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 11, 2026

## Description

Headroom compresses data before the data reaches a large language model. Prior to version 0.35.0, the Headroom WebSocket server does not validate the `Origin` header of incoming client WebSocket requests before forwarding the request to the upstream server, allowing malicious WebSocket clients to perform arbitrary LLM requests without authentication. This can be exploited by a malicious WebSocket client executed in a traditional or headless browser such as lightpanda, if the browser has access to the Headroom proxy and the OpenAI API key is stored in the `OPENAI_API_KEY` environment variable. Version 0.35.0 fixes the issue.

## Affected Products

- headroomlabs-ai — headroom (< 0.35.0)

## References

- [CNA](https://github.com/headroomlabs-ai/headroom/security/advisories/GHSA-h46j-26q3-rggf)
- [CNA](https://github.com/headroomlabs-ai/headroom/releases/tag/v0.35.0)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._