danny-avila LibreChat up to 0.8.4 Configuration /api/convos/import createMulterInstance allocation of resources

Summaryinfo

A vulnerability labeled as problematic has been found in danny-avila LibreChat. Impacted is the function createMulterInstance of the file /api/convos/import of the component Configuration Handler. The manipulation results in allocation of resources. This vulnerability is known as CVE-2026-54024. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in danny-avila LibreChat. Affected is the function createMulterInstance of the file /api/convos/import of the component Configuration Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. CVE summarizes:

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the fix for CVE-2024-11171 (commit bb58a2d0) added limits: { fileSize } to createMulterInstance() in the file upload routes. However, the POST /api/convos/import endpoint uses a separate multer instance that was never updated with the same limits configuration. Combined with the application-level size check being disabled by default (the CONVERSATION_IMPORT_MAX_FILE_SIZE_BYTES env var is commented out in .env.example), an authenticated user can upload arbitrarily large files to exhaust server disk space and memory. This vulnerability is fixed in 0.8.4-rc1.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-54024 since 06/11/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 0.8.4-rc1 eliminates this vulnerability.

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Productinfo

Type

• Chat Software

Vendor

• danny-avila

Name

• LibreChat

Version

• 0.7.5
• 0.7.6
• 0.7.7
• 0.7.8
• 0.7.9
• 0.7.9-rc1
• 0.8.0-rc2
• 0.8.1
• 0.8.1-rc2
• 0.8.2
• 0.8.2-rc2
• 0.8.2-rc3
• 0.8.3
• 0.8.3-rc1
• 0.8.3-rc2
• 0.8.4

Website

• Product: https://github.com/danny-avila/LibreChat/

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