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CVE-2026-79724 – Unauthenticated Remote Code Execution (OS Command Injection) – Langflow OSS 1.0.0–1

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Summary

CVE-2026-79724 is a critical OS command injection vulnerability in IBM Langflow OSS. Due to improper neutralization of special elements used in an OS command, a remote, unauthenticated attacker can execute arbitrary operating system commands on the underlying host. The flaw carries a CVSS v3.1 base score of 9.8 (Critical) and affects Langflow OSS versions 1.0.0 through 1.11.5.

Technical details

  • Root cause: Langflow OSS fails to properly neutralize special elements used in OS commands (CWE-78), stemming from incomplete code security controls and missing execution guards within the application.
  • Trigger conditions: An attacker sends crafted input to Langflow OSS that is passed into an OS command execution path without adequate sanitization.
  • Attack vector: Network — the vulnerability is remotely exploitable, requires no authentication (PR:N) and no user interaction (UI:N), with low attack complexity (AC:L).
  • Impact: Successful exploitation allows arbitrary OS command execution, resulting in high impact to confidentiality, integrity, and availability of the affected host (C:H/I:H/A:H).

Affected software

  • IBM Langflow OSS versions 1.0.0 through 1.11.5 (Windows, Linux, and macOS deployments)

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Upgrade Langflow OSS to version 1.11.6 or later, available via PyPI.
  • If no patch: No workarounds have been published; organizations unable to patch immediately should restrict network access to Langflow instances (e.g., limit exposure to trusted networks only) and monitor for anomalous process execution until the upgrade can be applied.

References

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