CVE-2026-40030

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-09. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
50.7%
KEV
Not listed

Published

April 8, 2026

Last Modified

June 23, 2026

Advisory Details (4)

Auto-updated Jun 10, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
generic

parseusbs < 1.9 Command Injection via Volume Path Argument | Advisories | VulnCheck

https://www.vulncheck.com/advisories/parseusbs-command-injection-via-volume-path-argument
generic

Sentinel: Security Review Program | Mobasi

https://mobasi.ai/sentinel
github_pr

Fix command injection in volume and LNK parsing

Fix merged in khyrenz/parseusbs PR #10 on 2026-02-08 — awaiting tagged release

https://github.com/khyrenz/parseusbs/pull/10
github_commit

commit 99f05996494e (khyrenz/parseusbs)

Fix landed in khyrenz/parseusbs commit 99f05996494e — awaiting tagged release

https://github.com/khyrenz/parseusbs/commit/99f05996494e7e41ea0c7e13145ba20eb793e46b

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 37× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-06-24 14:05 UTCEPSS rescore
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  14. 2026-06-15 05:32 UTCEG score recompute
  15. 2026-06-15 05:32 UTCGHSA enrichment
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  19. 2026-06-11 20:45 UTCEG score recompute
  20. 2026-06-11 20:45 UTCGHSA enrichment
  21. 2026-06-11 14:00 UTCEPSS rescore
  22. 2026-06-10 22:18 UTCEPSS rescore
  23. 2026-06-10 15:31 UTCEG score recompute
  24. 2026-06-10 15:31 UTCGHSA enrichment
  25. 2026-06-10 13:22 UTCEPSS rescore
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  27. 2026-06-10 02:23 UTCEG score recompute
  28. 2026-06-10 02:23 UTCGHSA enrichment
  29. 2026-06-09 13:14 UTCEG score recompute
  30. 2026-06-09 13:14 UTCGHSA enrichment
  31. 2026-06-08 14:17 UTCEPSS rescore
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  33. 2026-06-08 11:19 UTCEG score recompute
  34. 2026-06-08 11:19 UTCGHSA enrichment
  35. 2026-06-07 22:08 UTCEG score recompute
  36. 2026-06-07 22:08 UTCGHSA enrichment
  37. 2026-06-07 15:25 UTCEPSS rescore
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  40. 2026-06-07 08:58 UTCEG score recompute
  41. 2026-06-07 08:58 UTCGHSA enrichment
  42. 2026-06-06 13:47 UTCEPSS rescore
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  72. 2026-05-20 18:14 UTCEG score recompute
  73. 2026-05-20 18:14 UTCGHSA enrichment
  74. 2026-05-20 11:22 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2026-40030?
CVE-2026-40030 is a high vulnerability published on April 8, 2026. 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…
When was CVE-2026-40030 disclosed?
CVE-2026-40030 was first published in the National Vulnerability Database on April 8, 2026, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40030 actively exploited?
CVE-2026-40030 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 50.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-40030?
CVE-2026-40030 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-40030?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40030, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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