Vulnerability · Published Oct 22, 2025 · Assigned by @huntr_ai
CVE-2025-8848HTML Injection in Accept-Language Header in danny-avila/librechat
Medium 4.8
In plain English
A medium-severity code injection in danny-avila/librechat from danny-avila. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 39% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei.
Official description
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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| danny-avila | danny-avila/librechat | unspecified – through latest |
Weakness: CWE-94 · Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N