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.
CVE-2025-8849 · Severity: high · CVSS 7.5 · Published 2025-10-31
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.
No. Junglewise Threat Intelligence has no report of CVE-2025-8849 being exploited in the wild.
How severe is CVE-2025-8849?
High severity, with a CVSS score of 7.5, published 31 October 2025.
Which products and versions are affected?
LibreChat. The advisory does not name versions.
Is there a fix for CVE-2025-8849?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-8849?
Check whether you run LibreChat. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.