CVE-2026-6543Network attack vector

Authenticated command execution via malicious Python decorators

Published Apr 30, 2026 · Updated Apr 30, 2026

Code injection in Langflow Desktop 1.0.0 through 1.8.4 allows remote authenticated users to execute commands through code validation. The /api/v1/validate/code endpoint passes user-supplied Python to exec() but overlooks decorators, which run immediately as function definitions are parsed. A valid account and network access to the endpoint are required; injected decorators run with backend process privileges and can read secrets, change files, or pivot internally.

CVSS severity8.8
High
EPSS probability0.47%
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 Desktop 1.0.0 through 1.8.4 allows remote authenticated users to execute commands through code validation. The /api/v1/validate/code endpoint passes user-supplied Python to exec() but overlooks decorators, which run immediately as function definitions are parsed. A valid account and network access to the endpoint are required; injected decorators run with backend process privileges and can read secrets, change files, or pivot internally.

The record

CVE
CVE-2026-6543
Published
Apr 30, 2026
Updated
Apr 30, 2026
Vendor
OpenBMC Project
Product
Langflow Desktop
Classifications
CWE-94, T1059.006
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <=1.8.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenBMC Project · Langflow Desktopversion=1.0.0 <=1.8.4

Published CVSS scores

8.8IBMCVSS:3.1/AV:N/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.006Command and Scripting Interpreter: Python

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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