CVE-2026-72594
Received Received - Intake

Stored XSS in Lobe Chat via Malicious SVG Avatar Upload

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

Description
A stored cross-site scripting (XSS) vulnerability in lobehub/lobe-chat through v2.2.13 allows a low-privileged authenticated user to inject arbitrary JavaScript into the application by uploading a crafted SVG file as a user avatar.

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-10
AI Q&A
2026-08-10
EPSS Evaluated
N/A
NVD
CVE-2026-72594
EUVD
EUVD-2026-55164

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
lobehub lobe-chat 2.2.13

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a stored cross-site scripting (XSS) vulnerability in lobehub/lobe-chat through v2.2.13. A low-privileged authenticated user can upload a malicious SVG file as an avatar. The system uses the original filename to determine the file extension and content type instead of checking the actual file content. This allows the SVG to contain a script that executes when other users view the attacker's profile or avatar.

Detection Guidance

To detect this vulnerability, inspect uploaded SVG files for malicious JavaScript content. Check server logs for unexpected SVG uploads or unusual file extensions. Review user profiles for injected scripts by examining avatar file contents and metadata.

Impact Analysis

An attacker could steal session cookies, perform actions on your behalf, or redirect you to malicious sites. If you view an attacker's profile or avatar, their injected script runs in your browser, potentially compromising your account or data.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR's data protection principles and HIPAA's security requirements. It may result in data breaches, unauthorized disclosures, and non-compliance with privacy regulations.

Mitigation Strategies

Immediately update lobe-chat to the latest version beyond v2.2.13. Restrict SVG uploads to trusted sources or disable them entirely. Implement server-side validation to verify file content matches the declared extension. Sanitize SVG files to remove executable scripts before storage.

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