CVE-2026-54027

Description

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) without verifying ownership or EDIT permission on the target agent. A permission check was added to the POST /api/files route in a previous patch, but the image upload route was never updated with the same check. An attacker can simply use the image endpoint instead of the file endpoint to bypass the authorization entirely. This vulnerability is fixed in 0.8.4-rc1.

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Produits concernés

• danny-avila LibreChat
• Librechat librechat

Scores CVSS

Faiblesses (CWE)

• CWE-862

Références

• https://github.com/danny-avila/LibreChat/security/advisories/GHSA-c55r-p24w-hcj5 ExploitVendor Advisory
• https://github.com/danny-avila/LibreChat/security/advisories/GHSA-c55r-p24w-hcj5 ExploitVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories