Resource exhaustion in Danny-Avila Danny-Avila/librechat
CVE-2025-8849
LibreChat version 0.7.9 is vulnerable to a Denial of Service (DoS) attack due to unbounded parameter values in the `/api/memories` endpoint. The `key` and `value` parameters accept arbitrarily large inputs without proper validation, leading to a null pointer error in the Rust-based backend when excessively large values are submitted. This results in the inability to create new memories, impacting the stability of the service.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Danny-Avila Danny-Avila/librechat — versions unspecified
- Librechat — versions 0.7.9
Weakness classification (CWE)
References
- huntr.com/bounties/e9d9404c-cd19-4226-a580-9cba14b7d7d6 (Exploit, Third Party Advisory, Mitigation)
- github.com/danny-avila/librechat/commit/edf33bedcbb08c33e59df76f06454ed7efd896f9 (Patch)
Frequently asked questions
- What is CVE-2025-8849?
- CVE-2025-8849 is a high-severity vulnerability in Danny-Avila Danny-Avila/librechat, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2025-10-31.
- How severe is CVE-2025-8849?
- High severity. CVSS v3 base score is 7.5 out of 10.