---
id: CVE-2026-46711
title: >-
  Soft Machine is a Virtual Machine–based agentic development environment /
  Cloud OS
summary: >-
  Soft Machine is a Virtual Machine–based agentic development environment /
  Cloud OS. In versions 0.2.247 and prior, the workspace HTTP service that
  listens on 0.0.0.0:8080 inside each sm-ws-* Fly Machine exposes endpoints
  (/health, /file/…
severity: high
cvss: 8.3
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L'
cwe:
  - CWE-306
vendor: Soft-Machine-io
product: security
affected:
  - security <= 0.2.247
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T19:57:08.043'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-46711'
references:
  - url: >-
      https://github.com/Soft-Machine-io/security/security/advisories/GHSA-h6g6-qr45-qmrr
    label: security-advisories@github.com
  - url: >-
      https://github.com/Soft-Machine-io/security/security/advisories/GHSA-h6g6-qr45-qmrr
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-30T17:01:41.415498Z'
ingestedAt: '2026-09-30T17:13:20.838Z'
---

## Overview

Soft Machine is a Virtual Machine–based agentic development environment / Cloud OS. In versions 0.2.247 and prior, the workspace HTTP service that listens on 0.0.0.0:8080 inside each sm-ws-* Fly Machine exposes endpoints (/health, /file/<path>, /archive/<dir>) without any authentication or origin check. Any host that can reach TCP/8080 on a workspace can read arbitrary files under that workspace's /workspace root and download whole project trees as tar archives. Because every workspace shares the same Fly private 6PN and resolves all peer addresses via the unauthenticated _instances.internal TXT record, every other sm-ws-* machine on the same Fly app/org is a reachable, unauthenticated attacker — the trust boundary (workspace owner ↔ everyone-else) is missing. At time of publication, there are no publicly known patches.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.