What is CVE-2026-54027?

CVE-2026-54027 is a medium-severity vulnerability in Danny-avila Librechat, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-06-25.

How severe is CVE-2026-54027?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Danny-avila Librechat

CVE-2026-54027

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the POST /api/files/images endpoint allows any authenticated user to upload files into any agent's tool_resources (e.g., context, execute_code)…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Danny-avila Librechat — versions < 0.8.4-rc1

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54027?: CVE-2026-54027 is a medium-severity vulnerability in Danny-avila Librechat, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-06-25.
How severe is CVE-2026-54027?: Medium severity. CVSS v3 base score is 6.5 out of 10.