SEPTEMBER 17, 2026
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Case File

CVE-2026-12940

CRITICAL · CVSS 9.8 EPSS 0.68% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-30 · Last synced 2026-08-29

CyberRota Analysis

AI-Generated

IBM Langflow OSS versions 1.0.0 to 1.10.1 are susceptible to unauthenticated remote code execution due to a flaw in the MCP stdio launcher, where critical environment variables are not properly blocked. This vulnerability allows attackers to inject malicious code, potentially leading to severe system compromise. Organizations utilizing affected versions should prioritize immediate remediation to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
remote code execution code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-12940
Severity
CRITICAL
CVSS
9.8
EPSS
0.68%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)