CVE-2026-100368: CliInvoke.Specializations CliInvoke.Specializations Has Command Injection Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-wrvw-254r-wpmv",
  "modified" : "2026-09-25T21:41:48Z",
  "published" : "2026-09-25T21:41:48Z",
  "aliases" : [ "CVE-2026-100368" ],
  "summary" : "CliInvoke.Specializations has command injection in PowerShell and Cmd shell wrappers",
  "details" : "### Impact\nAn OS command injection vulnerability exists in the PowerShell and Cmd shell wrappers provided by the `CliInvoke.Specializations` package (the `PowershellProcessInvoker`/`CmdProcessInvoker` invokers, and the `UsePowerShell`/`UseCmd` middleware in v3 pre-release versions).\n\nThe wrappers re-run a caller-supplied target and arguments inside a shell command (`pwsh -Command ...` / `cmd /c ...`). In affected versions the wrapped command was delivered to the operating system as a single `ProcessStartInfo.Arguments` string. The OS command-line parser re-tokenizes that string before the shell parses it, so a double quote (`\"`) in the target or arguments breaks OS-level quoting and lets the wrapped shell reassemble a second, unintended command. \n\nAn attacker could exploit this to execute arbitrary commands with the privileges of the host process.\n\n### Patches\nThe Specializations Packages now deliver the command via `ProcessStartInfo.ArgumentList` (natively where supported, and polyfilled in older TFMs), so that the operating system passes argv verbatim and only the shell parses the command once. \n\nUpgrade to:\n- **2.8.5** (2.8.x line)\n- **2.9.4** (2.9.x line)\n- **2.10.5** (2.10.x line)\n- **3.0.0-beta.1** (3.x pre-release line)\n\n### Workarounds\nNo complete workaround is available. Until upgraded:\n\n- Reject or strip `\"` from any target path or argument passed to the PowerShell/Cmd wrappers. On 2.2.0 – 2.9.2 and 3.0.0-alpha.1 – alpha.4, also reject shell metacharacters (`;`, `|`, `&`, `$`, backtick, parentheses).\n- Alternatively, bypass the wrappers for untrusted input and invoke the target process directly so that no second shell parse of the data occurs.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CliInvoke.Specializations"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.2.0"
      }, {
        "fixed" : "2.8.5"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.8.4"
    }
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CliInvoke.Specializations"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.9.0"
      }, {
        "fixed" : "2.9.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.9.3"
    }
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CliInvoke.Specializations"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.10.0"
      }, {
        "fixed" : "2.10.5"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.10.4"
    }
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CliInvoke.Specializations"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0-alpha.1"
      }, {
        "fixed" : "3.0.0-beta.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 3.0.0-alpha.4"
    }
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "CliInvoke.Specializations"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0-alpha.8"
      }, {
        "fixed" : "3.0.0-beta.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 3.0.0-alpha.10"
    }
  }, {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "AlastairLundy.CliInvoke.Specializations"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.0.0-rc.1"
      }, {
        "fixed" : "2.0.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.6.1.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/alastairlundy/CliInvoke/security/advisories/GHSA-wrvw-254r-wpmv"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-100368"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/alastairlundy/CliInvoke/commit/1e98582f02eb43e345e5b97b8dd6ff9443806685"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/alastairlundy/CliInvoke/commit/2077e5239850e83dc9cc67ae6036dcd4e68a1876"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/alastairlundy/CliInvoke"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/alastairlundy/CliInvoke/releases/tag/2.10.5"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/alastairlundy/CliInvoke/releases/tag/3.0.0-beta.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-25T21:41:48Z",
    "nvd_published_at" : "2026-09-25T20:17:05Z"
  }
}