---
id: CVE-2026-61670
title: 'microsandbox is an easy, fast, local-first microVM runtime and library'
summary: >-
  microsandbox is an easy, fast, local-first microVM runtime and library. Prior
  to 0.5.10, sdk/rust/lib/runtime/spawn.rs serializes NetworkConfig secret
  values into the --network-config argument and passes per-sandbox secrets
  through repea…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-214
vendor: superradcompany
product: microsandbox
affected:
  - microsandbox < 0.5.10
patched:
  - microsandbox 0.5.10
published: '2026-09-18'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:25:27.050'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61670'
references:
  - url: >-
      https://github.com/superradcompany/microsandbox/commit/2ac6a177b11212d392bf1e7dc77aaf14e4768aa8
    label: security-advisories@github.com
  - url: >-
      https://github.com/superradcompany/microsandbox/commit/fbfb2366bfafad5e6df8778183f95fd8ca3c00a4
    label: security-advisories@github.com
  - url: 'https://github.com/superradcompany/microsandbox/issues/997'
    label: security-advisories@github.com
  - url: 'https://github.com/superradcompany/microsandbox/pull/1006'
    label: security-advisories@github.com
  - url: 'https://github.com/superradcompany/microsandbox/releases/tag/v0.5.10'
    label: security-advisories@github.com
  - url: >-
      https://github.com/superradcompany/microsandbox/security/advisories/GHSA-m8f5-rh7h-vgg3
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61670'
  - url: 'https://github.com/advisories/GHSA-m8f5-rh7h-vgg3'
  - url: 'https://github.com/superradcompany/microsandbox'
tags:
  - nvd
  - cve.org
  - ghsa
  - rust
  - osv
epss: 0.00115
epssPercentile: 0.0138
aliases:
  - GHSA-m8f5-rh7h-vgg3
ecosystem: rust
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T19:40:17.339147Z'
ingestedAt: '2026-09-18T20:51:25.751Z'
---

## Overview

microsandbox is an easy, fast, local-first microVM runtime and library. Prior to 0.5.10, sdk/rust/lib/runtime/spawn.rs serializes NetworkConfig secret values into the --network-config argument and passes per-sandbox secrets through repeated --env arguments accepted by crates/cli/lib/sandbox_cmd.rs. Other local users or co-resident processes can read these values through the host process table, including /proc process command lines on Linux and process listings on Linux and macOS, for the lifetime of the sandbox. Exploitation does not require code execution inside the sandbox or access to the spawning user's session, and can disclose host-side API keys, tokens, and environment secrets on shared hosts, CI runners, and developer systems. This issue is fixed in version 0.5.10.

## Remediation

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

## Package advisory (CVE-2026-61670)

Affected packages:

- `microsandbox < 0.5.10`

Patched in:

- `microsandbox 0.5.10`

Source: https://github.com/advisories/GHSA-m8f5-rh7h-vgg3