Which products and versions are affected by CVE-2025-8848?

Affected: Librechat versions 0.7.9; danny-avila/librechat versions >= unspecified. The full list is in the CVE brief.

Is CVE-2025-8848 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2025-8848 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2025-8848?

No public exploit code is known.

Is there a fix for CVE-2025-8848?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2025-8848 be patched?

Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.

Request A Demo

Vulnerability Intelligence

CVE-2025-8848

Medium

A vulnerability in danny-avila/librechat version 0.7.9 allows for HTML injection via the Accept-Language header.

Published Oct 22, 2025 · Updated Oct 10, 2026

Key Facts

Routine patching

CVE-2025-8848 is a medium-severity vulnerability (CVSS 5.4 v3.1) affecting Librechat, danny-avila/librechat.
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 0.5% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.

CVSS v3.1

5.4

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS (30-day exploit likelihood)

0.5%

Higher than 37.8% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2025-8848 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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 tag of the response. This can lead to potential security risks such as cross-site scripting (XSS) attacks.

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
LibrechatLibrechat	0.7.9	n/a
danny-avila/librechat	>= unspecified	n/a

Timeline

Publicly disclosed
Oct 22, 2025
Last updated
Oct 10, 2026

Weakness Type

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94 Improper Control of Generation of Code ('Code Injection')

References

FAQ

Common Questions.

A vulnerability in danny-avila/librechat version 0.7.9 allows for HTML injection via the Accept-Language header.
Affected: Librechat versions 0.7.9; danny-avila/librechat versions >= unspecified. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.

Is CVE-2025-8848 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.