Authorization bypass through user-controlled key in Langflow Desktop - CVE-2026-4503
Published: May 1, 2026
Vulnerability identifier: #VU128729
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-4503
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to an indirect object reference through a user-controlled key. A remote attacker can gain unauthorized access to sensitive information on the system.
Affected software
Langflow Desktop
How to mitigate CVE-2026-4503
Install updates from vendor's website.
Langflow Desktop - update to 1.9.0