Critical severity9.8NVD Advisory· Published Jul 30, 2026· Updated Aug 4, 2026
CVE-2026-12940
CVE-2026-12940
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2- Range: 1.0.0 - 1.10.1
Patches
Vulnerability mechanics
References
1- www.ibm.com/support/pages/node/7279995nvdVendor Advisory
News mentions
0No linked articles in our index yet.