Incorrect authorization in LibreChat - CVE-2026-44654
Published: June 3, 2026
Vulnerability identifier: #VU133256
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-44654
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: LibreChat
Affected software:
LibreChat
LibreChat
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper access control in the /api/files DELETE endpoint when handling file deletion requests for shared agents. A remote user can delete a reused file record by file_id to cause a denial of service.
The issue affects files reused across multiple agents, leaving other agents with stale file_id references that no longer resolve.
How to mitigate CVE-2026-44654
Install security update from vendor's website.