CVE-2026-105740

CRITICAL 9.9CVE-2026-105740 · Published 05/10/2026 · updated 06/10/2026

In short

CVE-2026-105740 is a CRITICAL (CVSS 9.9) vulnerability.
Chance of exploitation in the next 30 days (EPSS): 1.0%, higher than 64.3% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
—	No affected product versions are listed for this vulnerability yet.

Description

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, any authenticated Langflow user can achieve Remote Code Execution (RCE) on the server by adding an MCP server with the "Stdio" transport. The user-supplied command field is passed directly to bash -c "exec {command}" with zero validation, no allowlisting, and no sandboxing. The command executes immediately when the server list is fetched. Additionally, the env field allows arbitrary environment variable injection (e.g., LD_PRELOAD, PATH override). This vulnerability is fixed in 1.9.0.

References

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