Code Injection in Langflow - #VU142380
Published: August 13, 2026
Vulnerability identifier: #VU142380
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: N/A
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to improper control of code generation in the validate_code function exposed through the /api/v1/validate/code endpoint when processing user-supplied Python function definitions with malicious decorators. A remote user can send a specially crafted POST request containing a malicious decorator to execute arbitrary code.
Instances configured with AUTO_LOGIN can be exposed to any user without a valid session.
Affected software
Langflow
Remediation
Install security update from vendor's website.
Langflow - update to 1.10.1