IBM Langflow OSS 1.0.0-1.11.5 Remote Code Exec via Custom Component Auth Bypass
CVE-2026-81211 Published on September 10, 2026

Langflow is vulnerable to arbitrary code execution due to multiple incomplete code security controls and missing execution guards
IBM Langflow OSS 1.0.0 through 1.11.5 could allow a remote authenticated attacker to execute arbitrary Python code due to improper authorization of custom components in stored flows.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-81211 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH

Weakness Type

What is an AuthZ Vulnerability?

The software does not perform an authorization check when an actor attempts to access a resource or perform an action.

CVE-2026-81211 has been classified to as an AuthZ vulnerability or weakness.


Products Associated with CVE-2026-81211

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IBM Langflow Oss
 

Affected Versions

IBM Langflow OSS: