CVE-2026-81941 IBM Langflow OSS - Command Injection

IBM Langflow OSS 1.0.0 through 1.11.5 contains a command injection caused by an authenticated non-administrative user constructing a flow with an MCP Tools component using local stdio subprocess transport, letting attackers execute arbitrary OS commands at application privilege level, exploit requires authenticated non-administrative user.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.63% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution, Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
10 September 2026
Updated
15 October 2026
Weakness
CWE-284

Vendor fix

Update to a version later than 1.11.5 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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