CVE-2026-101861

low

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.

References

https://github.com/langflow-ai/langflow/security/advisories/GHSA-33p4-w7j3-33mw

https://github.com/langflow-ai/langflow/releases#release-v1.12.0

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-88338

Details

Source: Mitre, NVD

Published: 2026-09-28

Updated: 2026-09-30

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:H/Au:M/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 4.1

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L

Severity: Medium

CVSS v4

Base 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

Severity: Low

EPSS

EPSS: 0.00197