| Component | Langflow |
| Severity | critical (CVSS 9.8) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-07-30 |
| Last modified | 2026-08-04 |
| Affected versions | langflow >= 1.0.0, < 1.10.2 |
| Fixed in | 1.10.2 |
| Weakness | CWE-78 |
| CISA KEV | not listed |
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.
What to do
- Upgrade Langflow to
1.10.2or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
Read more
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