Langflow Code Execution via eval() in Component Input Schema
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.
CVE-2026-101861
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-101861
langflow
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/langflow-ai/langflow",
"vendor": "langflow-ai",
"product": "langflow",
"versions": [
{
"status": "affected",
"version": "1.0.16",
"lessThan": "1.12.0",
"versionType": "semver"
},
{
"status": "affected",
"version": "0.0.94",
"lessThan": "1.12.0",
"versionType": "semver"
}
],
"packageURL": "pkg:github/langflow-ai/langflow",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-101861
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #5393 · Revision 1
- Added to Heist Feed
- Publisher date