CVE-2026-78575Network attack vector

Authenticated command execution via MCP stdio arguments

Published Sep 10, 2026 · Updated Sep 10, 2026

Command injection in IBM Langflow OSS 1.0.0 through 1.11.5 allows remote authenticated users to execute arbitrary commands via MCP stdio configuration. The MCP component accepts embedded server commands and arguments and can start the configured subprocess without consistently applying the code-execution authorization policy. A valid account and permission to supply or resolve an MCP stdio configuration are required, and commands run with the Langflow service process's authority.

CVSS severity8.8
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in IBM Langflow OSS 1.0.0 through 1.11.5 allows remote authenticated users to execute arbitrary commands via MCP stdio configuration. The MCP component accepts embedded server commands and arguments and can start the configured subprocess without consistently applying the code-execution authorization policy. A valid account and permission to supply or resolve an MCP stdio configuration are required, and commands run with the Langflow service process's authority.

The record

CVE
CVE-2026-78575
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
IBM
Product
Langflow OSS
Classifications
CWE-78, CWE-863, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1.0.0 <=1.11.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · Langflow OSSversion=1.0.0 <=1.11.5

Published CVSS scores

8.8IBM PSIRTCVSS: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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-863Incorrect Authorization
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo