CVE-2026-12940
Langflow is affected by remote code execution due to multiple unauthenticated and insufficiently authorized API endpoints
- State
- Published
- Severity
- 9.8 Critical
- Published
- Jul 30, 2026
- Updated
- Jul 31, 2026
- Reserved
- Jun 22, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | ibm |
Weaknesses
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products
| Product | Versions |
|---|---|
Langflow OSSIBM |
|
References
- https://www.ibm.com/support/pages/node/7279995vendor-advisorypatch
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