External Control of File Name or Path in Langflow - CVE-2026-33309

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Main Vulnerability Database Vulnerabilities #VU124127

External Control of File Name or Path in Langflow - CVE-2026-33309

Published: March 19, 2026


Vulnerability identifier: #VU124127
CSH Severity: Medium
CVSS v4.0: 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/E:P/U:Green
CVE-ID: CVE-2026-33309
CWE-ID: CWE-73
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vendor: Langflow
Affected software:
Langflow

Detailed vulnerability description

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.


How to mitigate CVE-2026-33309

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Sources