External Control of File Name or Path in Langflow - CVE-2026-33309
Published: March 19, 2026
Vulnerability identifier: #VU124127
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-33309
CWE-ID: CWE-73
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to write arbitrary files.
The vulnerability exists due to external control of file name or path within LocalStorageService. A remote user can write files anywhere on the host system and execute arbitrary code on the target system.
Affected software
Langflow
How to mitigate CVE-2026-33309
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.