# 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.

Source: https://junglewise.ai/threats/cve-2025-8849-librechat-version-0-7-9-is-vulnerable-to-a-denial-of-service-dos  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-10-31  
License: CC BY 4.0 with a link back

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.

Technologies: [LibreChat](https://junglewise.ai/threats/technologies/librechat). Vendors: [LibreChat](https://junglewise.ai/threats/vendors/librechat).

## Quick answers

**Is CVE-2025-8849 exploited in the wild?** 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.

## Affected products

- LibreChat

## Related threats

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- [LibreChat resource exhaustion via missing rate limiting in duplicate endpoint](https://junglewise.ai/threats/cve-2026-54037-librechat-resource-exhaustion-via-missing-rate-limiting-in)
- [LibreChat SSRF via custom endpoint baseURL](https://junglewise.ai/threats/cve-2026-54033-librechat-ssrf-via-custom-endpoint-baseurl)
- [LibreChat token theft via missing OAuth resource validation in MCP](https://junglewise.ai/threats/cve-2026-54030-librechat-token-theft-via-missing-oauth-resource-validation-in)
- [danny-avila LibreChat IDOR in message deletion endpoint](https://junglewise.ai/threats/cve-2026-54029-danny-avila-librechat-idor-in-message-deletion-endpoint)