CVE-2024-42835Public exploitNetwork attack vector

Remote code execution via unvalidated Python exec

Published Oct 31, 2024 · Updated Mar 27, 2026

Code injection in Langflow 1.0.12 allows remote attackers to execute arbitrary Python code through the PythonCodeTool component. PythonCodeTool passes its tool_code value directly to Python exec() with the application globals and a local namespace, without validating the submitted code. Exploitation requires control of a flow's Tool Code and execution of that flow, after which commands run with the Langflow server process's access.

CVSS severity9.8
Critical
EPSS probability1.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Langflow 1.0.12 allows remote attackers to execute arbitrary Python code through the PythonCodeTool component. PythonCodeTool passes its tool_code value directly to Python exec() with the application globals and a local namespace, without validating the submitted code. Exploitation requires control of a flow's Tool Code and execution of that flow, after which commands run with the Langflow server process's access.

The record

CVE
CVE-2024-42835
Published
Oct 31, 2024
Updated
Mar 27, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 31, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1059.006Command and Scripting Interpreter: Python

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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