PT-2026-28740 · Langflow+1 · Langflow

Published 2026-03-27 · Updated 2026-03-27 · CVE-2026-5026

Mitre

CVSS v4.0

7.0

High

Base vector

AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-5026

Affected Products

Langflow

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-5026 · Security Note
• https://tenable.com/security/research/tra-2026-25 · Vendor Advisory