{"id":"CVE-2026-100368","aliases":["EUVD-2026-87320","GHSA-wrvw-254r-wpmv"],"status":"published","title":"CliInvoke.Specializations: Command injection in PowerShell and Cmd shell wrappers","description":"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.","severity":{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00581,"percentile":0.48218,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-78"],"published":"2026-09-25T19:53:56Z","modified":"2026-10-28T02:31:12Z","fixes":[{"ecosystem":"NuGet","package":"CliInvoke.Specializations","fixed_in":["2.8.5","2.9.4","2.10.5","3.0.0-beta.1"],"sources":["ghsa","osv"]},{"ecosystem":"NuGet","package":"AlastairLundy.CliInvoke.Specializations","fixed_in":["2.0.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.0"},{"last_affected":"2.8.4"},{"fixed":"2.8.5"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.9.0"},{"last_affected":"2.9.3"},{"fixed":"2.9.4"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.10.0"},{"last_affected":"2.10.4"},{"fixed":"2.10.5"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0-alpha.1"},{"last_affected":"3.0.0-alpha.4"},{"fixed":"3.0.0-beta.1"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0-alpha.8"},{"last_affected":"3.0.0-alpha.10"},{"fixed":"3.0.0-beta.1"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"AlastairLundy.CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0-rc.1"},{"last_affected":"1.6.1.1"},{"fixed":"2.0.2"}]}]},{"source":"osv","ecosystem":"NuGet","package":"CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.2.0"},{"fixed":"2.8.5"}]}],"versions":["2.2.0","2.2.1","2.3.0","2.3.1","2.3.2","2.3.3","2.3.4","2.4.0","2.4.1","2.4.2","2.4.3","2.4.4","2.4.5","2.5.0","2.5.1","2.5.2","2.5.3","2.5.4","2.6.0","2.6.1","2.7.0","2.7.1","2.8.0","2.8.1","2.8.2","2.8.3","2.8.4"]},{"source":"osv","ecosystem":"NuGet","package":"CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.9.0"},{"fixed":"2.9.4"}]}],"versions":["2.9.1","2.9.2","2.9.3"]},{"source":"osv","ecosystem":"NuGet","package":"CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.10.0"},{"fixed":"2.10.5"}]}],"versions":["2.10.0","2.10.2","2.10.3","2.10.4"]},{"source":"osv","ecosystem":"NuGet","package":"CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0-alpha.1"},{"fixed":"3.0.0-beta.1"}]}]},{"source":"osv","ecosystem":"NuGet","package":"CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0-alpha.8"},{"fixed":"3.0.0-beta.1"}]}]},{"source":"osv","ecosystem":"NuGet","package":"AlastairLundy.CliInvoke.Specializations","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0-rc.1"},{"fixed":"2.0.2"}]}],"versions":["1.0.0","1.1.0","1.2.0","1.2.1","1.3.0","1.3.1","1.4.1","1.4.3","1.4.4","1.4.5","1.5.1","1.5.2","1.6.0","1.6.1","1.6.1.1","2.0.0"]}],"products":[{"vendor":"alastairlundy","product":"cliinvoke.specializations"}],"references":[{"url":"https://github.com/alastairlundy/CliInvoke/security/advisories/GHSA-wrvw-254r-wpmv","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100368","tags":["advisory"]},{"url":"https://github.com/alastairlundy/CliInvoke/commit/1e98582f02eb43e345e5b97b8dd6ff9443806685","tags":["web"]},{"url":"https://github.com/alastairlundy/CliInvoke/commit/2077e5239850e83dc9cc67ae6036dcd4e68a1876","tags":["web"]},{"url":"https://github.com/alastairlundy/CliInvoke/releases/tag/2.10.5","tags":["web"]},{"url":"https://github.com/alastairlundy/CliInvoke/releases/tag/3.0.0-beta.1","tags":["web"]},{"url":"https://github.com/advisories/GHSA-wrvw-254r-wpmv"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100368.json","tags":["advisory"]},{"url":"https://github.com/alastairlundy/CliInvoke","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-100368","title":"CliInvoke.Specializations: Command injection in PowerShell and Cmd shell wrappers","description":"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.","status":"published","published":"2026-09-25T19:53:56.299Z","modified":"2026-09-30T00:06:47.101Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:20:06.562031Z"}],"euvd":[{"id":"EUVD-2026-87320","description":"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.","status":"published","published":"2026-09-25T19:53:56Z","modified":"2026-09-30T00:06:47Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T17:27:50.63586Z"}],"ghsa":[{"id":"GHSA-wrvw-254r-wpmv","title":"CliInvoke.Specializations has command injection in PowerShell and Cmd shell wrappers","description":"### 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 (`;`, `|`, `\u0026`, `$`, 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.","status":"published","published":"2026-09-25T21:41:48Z","modified":"2026-09-25T21:41:49Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:41:22.654187Z"}],"nvd":[{"id":"CVE-2026-100368","description":"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.","status":"published","published":"2026-09-25T20:17:05.99Z","modified":"2026-09-30T19:57:08.043Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:12:51.721923Z"}],"osv":[{"id":"CVE-2026-100368","title":"CliInvoke.Specializations: Command injection in PowerShell and Cmd shell wrappers","description":"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.","status":"published","published":"2026-09-25T19:53:56.299Z","modified":"2026-10-28T02:31:12.47743334Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:44:53.490346Z"},{"id":"GHSA-wrvw-254r-wpmv","title":"CliInvoke.Specializations has command injection in PowerShell and Cmd shell wrappers","description":"### 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 (`;`, `|`, `\u0026`, `$`, 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.","status":"published","published":"2026-09-25T21:41:48Z","modified":"2026-09-25T23:00:31.861722126Z","cvss":[{"version":"3.1","score":8.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:46:59.131095Z"}]}}