Arbitrary Command Execution Vulnerability in IBM Langflow
CVE-2026-19295

9.9CRITICAL

Key Information:

Vendor

IBM
Status
Langflow Oss
Vendor
CVE Published:
28 August 2026

What is CVE-2026-19295?

IBM Langflow OSS versions 1.0.0 to 1.11.1 are vulnerable to a serious security issue that allows authenticated attackers to execute arbitrary operating system commands. By manipulating the type field value while saving a flow and subsequently triggering the build of a wrapper flow that references it, attackers can escalate privileges from standard authenticated users to execute commands at the OS level. This exploit circumvents existing security policies designed to prevent unauthorized component customization, specifically by bypassing the LANGFLOW_ALLOW_CUSTOM_COMPONENTS=false policy control.

Affected Version(s)

Langflow OSS 1.0.0 <= 1.11.1

References

https://www.ibm.com/support/pages/node/7284733
vendor-advisorypatch

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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