Resource exhaustion in Danny-Avila Librechat
CVE-2026-54037
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (41.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Danny-Avila Librechat — versions < 0.8.4-rc1
- Librechat
Weakness classification (CWE)
References
- github.com/danny-avila/LibreChat/security/advisories/GHSA-g445-9wq6-jf3v (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-54037?
- CVE-2026-54037 is a medium-severity vulnerability in Danny-Avila Librechat, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-06-25.
- How severe is CVE-2026-54037?
- Medium severity. CVSS v3 base score is 6.5 out of 10.