CVE-2025-8849: Librechat

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Librechat Librechat: version 0.7.9 only

Published 2025-10-31. Last modified 2026-10-07.