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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00019.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
danny-avila danny-avila/librechat affected
Version Status Constraints
unspecified affected ≤ latest

Configuration 1 [-]

cpe:2.3:a:librechat:librechat:0.7.9:-:*:*:*:*:*:*

No data.

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Vendors Products
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Librechat Subscribe

Project Subscriptions

Vendors Products
Librechat Subscribe
Librechat Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://huntr.com/bounties/a05ebc1f-882a-4adc-b178-d3cefa4b730e cve-icon cve-icon
History

Thu, 30 Oct 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Thu, 30 Oct 2025 17:45:00 +0000

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'}

Thu, 23 Oct 2025 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Librechat
Librechat librechat
Vendors & Products Librechat
Librechat librechat

Wed, 22 Oct 2025 14:00:00 +0000

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: @huntr_ai

Published:

Updated: 2025-10-30T18:22:51.121Z

Reserved: 2025-08-10T18:16:29.790Z

Link: CVE-2025-8848

cve-icon Vulnrichment

Updated: 2025-10-30T18:22:46.780Z

cve-icon NVD

Status : Analyzed

Published: 2025-10-22T14:15:52.393

Modified: 2025-10-30T17:34:52.680

Link: CVE-2025-8848

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-10-23T10:04:55Z

Weaknesses