CRITICAL 9.8 NVD

CVE-2026-12940

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 Prot

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.

References

https://www.ibm.com/support/pages/node/7279995

Published: 2026-07-30 · Source: NVD · Feed updated: 2026-08-04

This critical severity vulnerability with a CVSS score of 9.8 was published on 2026-07-30 via NVD.

Risk Timeline

CVE Disclosed2026-07-30 · 4 days ago

Remediation Resources

Analysis & PoC

www.ibm.com/support/pages/node/7279995

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