CVE-2026-56274
CVE-2026-56274 · Flowise - Remote Code Execution via MCP Security Bypass in validateCommandFlags and validateArgsForLocalFileAccess
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Flowise before 3.1.2 contains multiple OS command injection vulnerabilities in the Custom MCP Server feature due to incomplete command-flag validation and a regex bypass in local file access restrictions. An attacker with a Flowise account of any role, or API access with view/update permissions for chatflows, can configure a malicious MCP server to bypass the validateCommandFlags blocklist (for example, 'docker build' is not blocked, and 'npx --yes' is not blocked while only '-y' is) and the validateArgsForLocalFileAccess checks, resulting in execution of arbitrary commands on the Flowise host.
CVSS 8.7 · Alta · EPSS 7,5% · Código de explotación público · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: node
Productos y versiones afectados
flowise
- Versiones
- ≥ 0, < 3.1.2: Afectada (semver)
- 3.1.2: No afectada (semver)
Actualiza a 3.1.2
flowise components
- Versiones
- ≥ 0, < 3.1.2: Afectada (semver)
- 3.1.2: No afectada (semver)
Actualiza a 3.1.2
flowise npm
- Intervalos de versiones afectados
- SEMVER: < 3.1.2
Actualiza a 3.1.2
flowise-components npm
- Intervalos de versiones afectados
- SEMVER: < 3.1.2
Actualiza a 3.1.2