Allocation of Resources Without Limits or Throttling in LibreChat - CVE-2026-54037
Published: June 3, 2026
Vulnerability identifier: #VU133260
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-54037
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the /api/convos/duplicate endpoint when handling rapid conversation duplication requests. A remote user can send a series of crafted requests to cause a denial of service.
The vulnerable endpoint performs expensive database read and batch-write operations equivalent to conversation forking, and exploitation can degrade service for other users on the same instance.
Affected software
LibreChat
How to mitigate CVE-2026-54037
Install security update from vendor's website.
LibreChat - update to 0.8.4 rc1