CVE-2025-8848

HTML Injection in Accept-Language Header in danny-avila/librechat

Published Oct 22, 2025 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-79
CPEs cpe:2.3:a:librechat:librechat:0.7.9:-:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

Type Values Removed Values Added
First Time appeared Librechat
Librechat librechat
Vendors & Products Librechat
Librechat librechat
Type Values Removed Values Added
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.
Title HTML Injection in Accept-Language Header in danny-avila/librechat
Weaknesses CWE-94
References
Metrics cvssV3_0

{'score': 4.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
@huntr_ai
Published
Updated
Oct 30, 2025, 6:22 PM
Reserved
Aug 10, 2025, 6:16 PM
Status
Analyzed
Published
Oct 22, 2025, 2:15 PM
Modified
Oct 8, 2026, 11:10 AM