CVE-2025-8848: Librechat

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability in danny-avila/librechat version 0.7.9 allows for HTML injection via the Accept-Language header. When a logged-in user sends an HTTP GET request with a crafted Accept-Language header, arbitrary HTML can be injected into the <html lang=""> tag of the response. This can lead to potential security risks such as cross-site scripting (XSS) attacks.

Affected products

• Librechat Librechat: version 0.7.9 only

Published 2025-10-22. Last modified 2026-10-08.