PT-2026-66519 · Ibm · Langflow Oss
CVE-2026-12940
·
Published
2026-07-30
·
Updated
2026-07-30
CVSS v3.1
9.8
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
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.
Fix
OS Command Injection
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Weakness Enumeration
Related Identifiers
Affected Products
Langflow Oss