CVE-2026-5026 — MEDIUM (5.4)

Vulnerability 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.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Langflow	Langflow	-

Related Weaknesses (CWE)

CWE-79

References

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

FAQ

What is CVE-2026-5026?

CVE-2026-5026 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 ...

How severe is CVE-2026-5026?

CVE-2026-5026 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-5026?

Check the references section above for vendor advisories and patch information. Affected products include: Langflow Langflow.