Medium severity5.4NVD Advisory· Published Mar 27, 2026· Updated Apr 20, 2026
CVE-2026-5026
CVE-2026-5026
Description
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.
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Affected products
1- cpe:2.3:a:langflow:langflow:-:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
1- www.tenable.com/security/research/tra-2026-25nvdVendor Advisory
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