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CVE-2026-12940
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2026-07-30T17:16:28.040 · Last modified 2026-07-30T17:16:28.040

Summary

IBM Langflow OSS 1.0.0 through 1.10.1  are vulnerable to unauthenticated remote code execution via environment variable injection in the MCP (Model Context Protocol) stdio launcher. The vulnerability exists in src/lfx/src/lfx/base/mcp/util.py where the DANGEROUS_ENV_VARS blocklist fails to include SHELLOPTS , BASHOPTS , and PS4 environment variables.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.