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.

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)

EPSS: 0.003 (24.4th percentile) — read the EPSS interpretation.

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.

Affected products

Danny-avila Danny-avila/librechat — versions unspecified
Librechat — versions 0.7.9

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

security@huntr.dev (Exploit, Third Party Advisory, Mitigation)
security@huntr.dev (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.