EUVD-2026-75796
GHSA-gcjr-xxm4-x2j5
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Low-privilege authenticated user injects OS commands via MCP config (PR:L, AV:N, AC:L); full C/I/A impact from arbitrary command execution; scope unchanged.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
Lifecycle Timeline
2DescriptionCVE.org
IBM Langflow OSS 1.0.0 through 1.11.5 could allow a remote authenticated attacker to execute arbitrary commands due to improper validation of command-line arguments in the MCP stdio server configuration.
AnalysisAI
Authenticated remote code execution in IBM Langflow OSS 1.0.0-1.11.5 allows a low-privileged attacker to execute arbitrary OS commands by supplying malicious command-line arguments through the MCP stdio server configuration interface. The root cause (CWE-78: OS Command Injection) is insufficient sanitization of user-controlled argument strings before they are passed to a subprocess invocation, giving the attacker OS-level code execution within the application's security context. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a valid low-privilege account on the target IBM Langflow OSS instance (CVSS PR:L confirmed). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately characterizes a high-severity but authenticated-only flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade IBM Langflow OSS to the patched version specified in the vendor advisory at https://www.ibm.com/support/pages/node/7286666 - the exact fixed version number is not stated in the currently available input data (patch available per vendor advisory). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running IBM Langflow versions 1.0.0 through 1.11.5 and restrict access to MCP stdio server configuration interfaces in multi-tenant environments; isolate or disable any instances not actively required. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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