CVE-2026-5026
Langflow - Stored XSS via Malicious SVG Upload
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
The '/api/v1/files/images/{flow_id}/{file_name}' endpoint serves SVG files with the 'image/svg+xml' content type without sanitizing their content. Since SVG files can contain embedded JavaScript, an attacker can upload a malicious SVG that executes arbitrary JavaScript when viewed by other users, leading to stored cross-site scripting (XSS). This allows stealing authentication tokens stored in cookies, including JWT access and refresh tokens.
| CWE | CWE-79 |
| Vendor | langflow-ai |
| Product | langflow |
| Published | Mar 27, 2026 |
| Last Updated | Mar 27, 2026 |
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Affected Versions
langflow-ai / langflow
0