CVE-2026-54024

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-52f6-fqwv-jccf	Exploit Vendor Advisory
https://github.com/danny-avila/LibreChat/security/advisories/GHSA-52f6-fqwv-jccf	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:librechat:librechat:*:*:*:*:*:*:*:*

History

29 Jun 2026, 16:03

Type	Values Removed	Values Added
First Time		Librechat librechat Librechat
CPE		cpe:2.3:a:librechat:librechat::::::::
References	~~() https://github.com/danny-avila/LibreChat/security/advisories/GHSA-52f6-fqwv-jccf -~~	() https://github.com/danny-avila/LibreChat/security/advisories/GHSA-52f6-fqwv-jccf - Exploit, Vendor Advisory

25 Jun 2026, 19:16

Type	Values Removed	Values Added
References	~~() https://github.com/danny-avila/LibreChat/security/advisories/GHSA-52f6-fqwv-jccf -~~	() https://github.com/danny-avila/LibreChat/security/advisories/GHSA-52f6-fqwv-jccf -

25 Jun 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-25 17:16

Updated : 2026-06-29 16:03

NVD link : CVE-2026-54024

Mitre link : CVE-2026-54024

CVE.ORG link : CVE-2026-54024

JSON object : View

Products Affected

librechat

librechat

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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