CVE-2026-54024 | THREATINT

Description

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.

PUBLISHED Reserved 2026-06-11 | Published 2026-06-25 | Updated 2026-06-25 | Assigner GitHub_M

MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

< 0.8.4-rc1

affected

References

github.com/...reChat/security/advisories/GHSA-52f6-fqwv-jccf exploit

github.com/...reChat/security/advisories/GHSA-52f6-fqwv-jccf

cve.org (CVE-2026-54024)

nvd.nist.gov (CVE-2026-54024)

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