CVE-2026-5026

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://www.tenable.com/security/research/tra-2026-25	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:langflow:langflow:-:*:*:*:*:*:*:*

History

20 Apr 2026, 13:04

Type	Values Removed	Values Added
References	~~() https://www.tenable.com/security/research/tra-2026-25 -~~	() https://www.tenable.com/security/research/tra-2026-25 - Vendor Advisory
First Time		Langflow langflow Langflow
CPE		cpe:2.3:a:langflow:langflow:-:::::::*
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.4

27 Mar 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-27 15:17

Updated : 2026-04-20 13:04

NVD link : CVE-2026-5026

Mitre link : CVE-2026-5026

CVE.ORG link : CVE-2026-5026

JSON object : View

Products Affected

langflow

langflow

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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