CVE-2026-100368

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (45th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 8.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

CliInvoke is a .NET library for invoking command-line programs, and its CliInvoke.Specializations packages provide specialized wrappers for shells such as PowerShell and Windows Command Prompt. CliInvoke.Specializations versions 2.2.0 through 2.8.4, 2.9.0 through 2.9.3, 2.10.0 through 2.10.4, 3.0.0-alpha.1 through 3.0.0-alpha.4, and 3.0.0-alpha.8 through 3.0.0-alpha.10, as well as AlastairLundy.CliInvoke.Specializations versions 1.0.0-rc.1 through 1.6.1.1, contain an OS command injection vulnerability in their PowerShell and Cmd wrappers. The wrappers pass a caller-controlled target and arguments to pwsh -Command or cmd /c using a single ProcessStartInfo.Arguments string, allowing a double quote in untrusted input to break operating-system-level quoting and cause the shell to execute an additional command with the host process's privileges. The vulnerability is patched in CliInvoke.Specializations versions 2.8.5, 2.9.4, 2.10.5, and 3.0.0-beta.1, and in AlastairLundy.CliInvoke.Specializations version 2.0.2. No complete workaround is available; users unable to upgrade should reject or remove double quotes from target paths and arguments, additionally reject shell metacharacters in versions 2.2.0 through 2.9.2 and 3.0.0-alpha.1 through 3.0.0-alpha.4, or bypass the PowerShell and Cmd wrappers and invoke target processes directly when handling untrusted input.

CVSS v3
8.4
EG Score
8.4HIGHmedium confidence
EG Risk
38
EG Risk 38/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity84% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 25, 2026

Last Modified

September 30, 2026

Advisory Details (1)

Auto-updated Sep 25, 2026
Patch available. Sources: github.
github Patch Available

CliInvoke.Specializations: Command injection vulnerability in PowerShell and Cmd shell wrappers · Advisory · alastairlundy/CliInvoke · GitHub

https://github.com/alastairlundy/CliInvoke/security/advisories/GHSA-wrvw-254r-wpmv

Vendor Advisories for CVE-2026-100368(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 1 ecosystem)
NuGet(2)
PackageVulnerable rangeFixed inDependents
AlastairLundy.CliInvoke.Specializations1.0.0 ... 2.0.0 (16 versions)2.0.2—
CliInvoke.Specializations2.2.0 ... 2.8.4 (27 versions)2.8.5—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 20× 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. 2026-10-03 20:54 UTCEG score recompute
  2. 2026-10-03 14:25 UTCEPSS rescore
  3. 2026-10-02 20:38 UTCEG score recompute
  4. 2026-10-01 20:16 UTCEG score recompute
  5. 2026-10-01 19:49 UTCEPSS rescore
  6. 2026-09-30 20:02 UTCEG score recompute
  7. 2026-09-30 15:02 UTCEPSS rescore
  8. 2026-09-30 01:30 UTCEG score recompute
  9. 2026-09-30 00:39 UTCEG score recompute
  10. 2026-09-29 23:49 UTCEG score recompute
  11. 2026-09-29 15:20 UTCEPSS rescore
  12. 2026-09-29 09:24 UTCEG score recompute
  13. 2026-09-28 21:18 UTCEG score recompute
  14. 2026-09-28 13:50 UTCEPSS rescore
  15. 2026-09-27 21:04 UTCEG score recompute
  16. 2026-09-26 20:50 UTCEG score recompute
  17. 2026-09-26 15:58 UTCEPSS rescore
  18. 2026-09-25 20:37 UTCEG score recompute
  19. 2026-09-25 20:00 UTCEG score recompute
  20. 2026-09-25 19:59 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100368?
CVE-2026-100368 is a high vulnerability published on September 25, 2026. CliInvoke is a .NET library for invoking command-line programs, and its CliInvoke.Specializations packages provide specialized wrappers for shells such as PowerShell and Windows Command Prompt. CliInvoke.Specializations versions 2.2.0 through 2.8.4, 2.9.0 through 2.9.3, 2.10.0 through 2.10.4,…
When was CVE-2026-100368 disclosed?
CVE-2026-100368 was first published on September 25, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100368 actively exploited?
CVE-2026-100368 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100368?
CVE-2026-100368 has a CVSS base score of 8.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100368?
A fix for CVE-2026-100368 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-100368 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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