Langflow 1.0.16 before 1.12.0 and 0.0.94 before 1.12.0 contain an unsafe eval() vulnerability in schema.py that allows authenticated attackers to achieve code execution by placing a Python object with a malicious __repr__ method into component input options lists. The eval() sink is triggered when a component is converted into a LangChain tool via ComponentToolkit.get_tools(), including during custom component saves through the API, by interpolating options into a Literal type string that is passed directly to eval() without safe evaluation controls.
History

Thu, 01 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*

Wed, 30 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 28 Sep 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Langflow
Langflow langflow
Vendors & Products Langflow
Langflow langflow

Mon, 28 Sep 2026 16:00:00 +0000

Type Values Removed Values Added
Description Langflow 1.0.16 before 1.12.0 and 0.0.94 before 1.12.0 contain an unsafe eval() vulnerability in schema.py that allows authenticated attackers to achieve code execution by placing a Python object with a malicious __repr__ method into component input options lists. The eval() sink is triggered when a component is converted into a LangChain tool via ComponentToolkit.get_tools(), including during custom component saves through the API, by interpolating options into a Literal type string that is passed directly to eval() without safe evaluation controls.
Title Langflow Code Execution via eval() in Component Input Schema
Weaknesses CWE-94
CWE-95
References
Metrics cvssV3_1

{'score': 4.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L'}

cvssV4_0

{'score': 2.1, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-28T15:49:14.349Z

Updated: 2026-10-01T15:19:46.570Z

Reserved: 2026-09-28T15:44:45.388Z

Link: CVE-2026-101861

cve-icon Vulnrichment

Updated: 2026-09-30T19:02:30.860Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-28T16:17:13.157

Modified: 2026-09-30T21:16:55.213

Link: CVE-2026-101861

cve-icon Redhat

No data.