CVE-2026-54037

MediumCVSS 6.5/10Last modified Oct 25, 2026

Description

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.4-rc1, the fix for CVE-2025-7105 added forkIpLimiter and forkUserLimiter rate limiters to POST /api/convos/fork to prevent rapid-fire conversation duplication. However, the POST /api/convos/duplicate endpoint — which is in the same file and performs the exact same expensive database operations — was not given any rate limiter. An authenticated user can bypass the CVE-2025-7105 fix by using /duplicate instead of /fork to exhaust server resources. This vulnerability is fixed in 0.8.4-rc1.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-770

Affected software

Vendor	Product	Versions
danny-avila	LibreChat	< 0.8.4-rc1

References

https://github.com/danny-avila/LibreChat/security/advisories/GHSA-g445-9wq6-jf3vExploit, Vendor Advisory

Timeline

Published: Jun 25, 2026
Last modified: Oct 25, 2026
NVD status: Analyzed

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