Vigie VulnDBEuropean-hosted Vulnerability DB

CVE-2026-101861

Langflow Code Execution via eval() in Component Input Schema

At a glance

Severity
LOW 2.1
EPSS
EPSS 0.20 % · percentile 9 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
VulnCheck
NVD status
Awaiting Analysis

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.

Scores

VersionScoreVectorScored by
CVSS 4.0LOW 2.1CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:NVulnCheck
CVSS 3.1MEDIUM 4.1CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:LVulnCheck
CVSS 4.0LOW 2.1CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1MEDIUM 4.1CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:LNVD · disclosure@vulncheck.com (Secondary)

Weaknesses (CWE)

European references

Affected products

ProductVersions
langflow-ai · langflowaffected 1.0.16 < 1.12.0 ; affected 0.0.94 < 1.12.0

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD