CVE-2025-8848 MEDIUM

CVE-2025-8848: HTML Injection in Accept-Language Header in danny-avila/librechat

Vendor Danny-Avila
Product danny-avila/librechat
Weakness CWE-94 · Code injection
Published October 22, 2025
Last update October 30, 2025
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

October 22, 2025 CVE published
October 30, 2025 Record updated