Security Advisory

CVE-2026-12940

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-30 16:41:54

Last updated 2026-07-31 03:56:16

Assigner ibm

CVSS score not scored

State PUBLISHED

Description

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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