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.
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Solution
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Workaround
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References
History
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 |
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cvssV3_1
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MITRE
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-09-28T15:49:14.349Z
Reserved: 2026-09-28T15:44:45.388Z
Link: CVE-2026-101861
Vulnrichment
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NVD
Status : Received
Published: 2026-09-28T16:17:13.157
Modified: 2026-09-28T16:17:13.157
Link: CVE-2026-101861
Redhat
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OpenCVE Enrichment
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