microsandbox: Secret values exposed in world-readable process arguments

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-61670
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 21:17:01 UTC
Updated2026-09-24 21:25:27 UTC
Descriptionmicrosandbox 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS: 0.001150000 probability, percentile 0.013860000 (date 2026-09-25)

Problem Types: CWE-214 | CWE-214 CWE-214: Invocation of Process Using Visible Sensitive Information

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Superradcompany Microsandbox affected < 0.5.10 Not specified

References

ReferenceSourceLinkTags
github.com/superradcompany/microsandbox/security/advisories/GHSA-m8f5-rh... [email protected] github.com
github.com/superradcompany/microsandbox/commit/fbfb2366bfafad5e6df877818... [email protected] github.com
github.com/superradcompany/microsandbox/pull/1006 [email protected] github.com
github.com/superradcompany/microsandbox/releases/tag/v0.5.10 [email protected] github.com
github.com/superradcompany/microsandbox/commit/2ac6a177b11212d392bf1e7dc... [email protected] github.com
github.com/superradcompany/microsandbox/issues/997 [email protected] github.com
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