Langflow Code Execution via eval() in Component Input Schema (CVE-2026-101861) | HOL Guard CVE

Low · CVSS 2.1CVE-2026-101861

Langflow Code Execution via eval() in Component Input Schema

Answer in brief

CVE-2026-101861 records a Low severity (CVSS 2.1) vulnerability in Langflow Code Execution via eval() in Component Input Schema. The current sources do not mark it as known exploited. The current feed maps langflow-ai/langflow (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 28, 2026Updated Sep 28, 2026Source checked Sep 28, 2026First seen by HOL Sep 28, 2026Material review Sep 28, 2026

Upstream Advisory

Key facts

Risk: Low · CVSS 2.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 2.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps langflow-ai/langflow (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
langflow-ai/langflowgeneric	>=1.0.16 <1.12.0 \|\| >=0.0.94 <1.12.0	1.12.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for langflow-ai/langflow.
Review the reported fix. Update langflow-ai/langflow to 1.12.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 28, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.