{"id":"CVE-2026-100369","aliases":["EUVD-2026-87354","GHSA-j73w-8hfr-4gc9"],"status":"published","title":"CliInvoke: Argument Injection in Extensibility Runner Factory","description":"CliInvoke and its formerly named `AlastairLundy.CliInvoke` package are .NET libraries for invoking command-line programs and wrapping executable processes. `CliInvoke` versions 2.0.0 through 2.8.4, 2.9.0 through 2.9.3, 2.10.0 through 2.10.4, and 3.0.0-alpha.1 through 3.0.0-beta.1, as well as `AlastairLundy.CliInvoke` versions 2.0.0-alpha.1 through 2.0.0, contain an argument-injection vulnerability in `RunnerProcessFactory` on the 2.x line and `RunnerConfigurationFactory` on the 3.x line. These factories combine runner arguments, a caller-controlled target, and caller-controlled arguments into one `ProcessStartInfo.Arguments` string, allowing a double quote in the target or an argument to terminate an operating-system-level quoted region and inject unintended elements into the runner’s argument vector, potentially resulting in arbitrary command execution when a shell runner is used. The vulnerability is patched in `CliInvoke` versions 2.8.5, 2.9.4, 2.10.5, and 3.0.0-beta.2, and in `AlastairLundy.CliInvoke` version 2.0.2. No complete workaround is available; users unable to upgrade can partially mitigate the issue by removing double quotes from targets and arguments, additionally removing shell metacharacters when using shell runners, or bypassing the vulnerable factory and constructing a `ProcessConfiguration` with an explicit `ArgumentList`.","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":0.00359,"percentile":0.30073,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-88"],"published":"2026-09-25T20:26:51Z","modified":"2026-10-28T02:30:22Z","fixes":[{"ecosystem":"NuGet","package":"CliInvoke","fixed_in":["2.8.5","2.9.4","2.10.5","3.0.0-beta.2"],"sources":["ghsa","osv"]},{"ecosystem":"NuGet","package":"AlastairLundy.CliInvoke","fixed_in":["2.0.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"CliInvoke","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"last_affected":"2.8.4"},{"fixed":"2.8.5"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"CliInvoke","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.9.0"},{"last_affected":"2.9.3"},{"fixed":"2.9.4"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"CliInvoke","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.10.0"},{"last_affected":"2.10.4"},{"fixed":"2.10.5"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"CliInvoke","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0-alpha.1"},{"last_affected":"3.0.0-beta.1"},{"fixed":"3.0.0-beta.2"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"AlastairLundy.CliInvoke","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0-alpha.1"},{"last_affected":"2.0.0"},{"fixed":"2.0.2"}]}]},{"source":"osv","ecosystem":"NuGet","package":"CliInvoke","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.8.5"}]}],"versions":["2.0.0","2.0.1","2.1.0","2.1.1","2.1.2","2.1.3","2.1.4","2.1.5","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","2.7.2","2.8.0","2.8.1","2.8.2","2.8.3","2.8.4"]},{"source":"osv","ecosystem":"NuGet","package":"CliInvoke","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.9.0"},{"fixed":"2.9.4"}]}],"versions":["2.9.0","2.9.1","2.9.2","2.9.3"]},{"source":"osv","ecosystem":"NuGet","package":"CliInvoke","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.10.0"},{"fixed":"2.10.5"}]}],"versions":["2.10.1","2.10.2","2.10.3","2.10.4"]},{"source":"osv","ecosystem":"NuGet","package":"CliInvoke","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0-alpha.1"},{"fixed":"3.0.0-beta.2"}]}]},{"source":"osv","ecosystem":"NuGet","package":"AlastairLundy.CliInvoke","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0-alpha.1"},{"fixed":"2.0.2"}]}],"versions":["2.0.0"]}],"products":[{"vendor":"alastairlundy","product":"alastairlundy.cliinvoke"},{"vendor":"alastairlundy","product":"cliinvoke"}],"references":[{"url":"https://github.com/alastairlundy/CliInvoke/security/advisories/GHSA-j73w-8hfr-4gc9","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100369","tags":["advisory"]},{"url":"https://github.com/alastairlundy/CliInvoke/commit/1e98582f02eb43e345e5b97b8dd6ff9443806685","tags":["web"]},{"url":"https://github.com/alastairlundy/CliInvoke/commit/fac321c7cc9cf4372919842701829ca2be5e7307","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.2","tags":["web"]},{"url":"https://github.com/advisories/GHSA-j73w-8hfr-4gc9"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100369.json","tags":["advisory"]},{"url":"https://github.com/alastairlundy/CliInvoke","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-100369","title":"CliInvoke: Argument Injection in Extensibility Runner Factory","description":"CliInvoke and its formerly named `AlastairLundy.CliInvoke` package are .NET libraries for invoking command-line programs and wrapping executable processes. `CliInvoke` versions 2.0.0 through 2.8.4, 2.9.0 through 2.9.3, 2.10.0 through 2.10.4, and 3.0.0-alpha.1 through 3.0.0-beta.1, as well as `AlastairLundy.CliInvoke` versions 2.0.0-alpha.1 through 2.0.0, contain an argument-injection vulnerability in `RunnerProcessFactory` on the 2.x line and `RunnerConfigurationFactory` on the 3.x line. These factories combine runner arguments, a caller-controlled target, and caller-controlled arguments into one `ProcessStartInfo.Arguments` string, allowing a double quote in the target or an argument to terminate an operating-system-level quoted region and inject unintended elements into the runner’s argument vector, potentially resulting in arbitrary command execution when a shell runner is used. The vulnerability is patched in `CliInvoke` versions 2.8.5, 2.9.4, 2.10.5, and 3.0.0-beta.2, and in `AlastairLundy.CliInvoke` version 2.0.2. No complete workaround is available; users unable to upgrade can partially mitigate the issue by removing double quotes from targets and arguments, additionally removing shell metacharacters when using shell runners, or bypassing the vulnerable factory and constructing a `ProcessConfiguration` with an explicit `ArgumentList`.","status":"published","published":"2026-09-25T20:26:51.352Z","modified":"2026-09-28T13:42:58.777Z","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-88"],"updated_at":"2026-11-02T14:20:06.562031Z"}],"euvd":[{"id":"EUVD-2026-87354","description":"CliInvoke and its formerly named `AlastairLundy.CliInvoke` package are .NET libraries for invoking command-line programs and wrapping executable processes. `CliInvoke` versions 2.0.0 through 2.8.4, 2.9.0 through 2.9.3, 2.10.0 through 2.10.4, and 3.0.0-alpha.1 through 3.0.0-beta.1, as well as `AlastairLundy.CliInvoke` versions 2.0.0-alpha.1 through 2.0.0, contain an argument-injection vulnerability in `RunnerProcessFactory` on the 2.x line and `RunnerConfigurationFactory` on the 3.x line. These factories combine runner arguments, a caller-controlled target, and caller-controlled arguments into one `ProcessStartInfo.Arguments` string, allowing a double quote in the target or an argument to terminate an operating-system-level quoted region and inject unintended elements into the runner’s argument vector, potentially resulting in arbitrary command execution when a shell runner is used. The vulnerability is patched in `CliInvoke` versions 2.8.5, 2.9.4, 2.10.5, and 3.0.0-beta.2, and in `AlastairLundy.CliInvoke` version 2.0.2. No complete workaround is available; users unable to upgrade can partially mitigate the issue by removing double quotes from targets and arguments, additionally removing shell metacharacters when using shell runners, or bypassing the vulnerable factory and constructing a `ProcessConfiguration` with an explicit `ArgumentList`.","status":"published","published":"2026-09-25T20:26:51Z","modified":"2026-09-28T13:42:58Z","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":"2026-11-02T17:27:53.425914Z"}],"ghsa":[{"id":"GHSA-j73w-8hfr-4gc9","title":"CliInvoke: Argument Injection in Extensibility Runner Factory","description":"### Impact\nAn argument-injection vulnerability exists in the `CliInvoke`\npackage's runner factory: `RunnerProcessFactory` on the 2.x line and\n`RunnerConfigurationFactory` on the 3.x line.\n\nThe factory joins the runner arguments, the caller's target, and the\ncaller's arguments into a single `ProcessStartInfo.Arguments` string and\nhands it to the OS. The OS command-line parser re-tokenizes the string\nbefore the runner sees it. A double quote (`\"`) in the target or in any\nargument closes the OS-level quoted region and lets the next character\nenter argv as a separate element.\n\n### Patches\nUpgrade to:\n\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.2** (3.x pre-release line)\n\n### Workarounds\nNo complete workaround is available. Until you can upgrade:\n\n- Strip `\"` from any target or argument before passing it to the\n  factory. On shell runners, also strip `;`, `|`, `\u0026`, `$`, backtick,\n  and parentheses.\n- Or bypass the factory entirely and build the `ProcessConfiguration`\n  directly. Set `ArgumentList` explicitly to the argv you want the\n  runner to receive.\n\nThese are partial mitigations. They shift the quoting problem to your\ncode.","status":"published","published":"2026-09-25T21:41:36Z","modified":"2026-09-25T21:41:37Z","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-88"],"updated_at":"2026-11-02T14:41:22.654187Z"}],"nvd":[{"id":"CVE-2026-100369","description":"CliInvoke and its formerly named `AlastairLundy.CliInvoke` package are .NET libraries for invoking command-line programs and wrapping executable processes. `CliInvoke` versions 2.0.0 through 2.8.4, 2.9.0 through 2.9.3, 2.10.0 through 2.10.4, and 3.0.0-alpha.1 through 3.0.0-beta.1, as well as `AlastairLundy.CliInvoke` versions 2.0.0-alpha.1 through 2.0.0, contain an argument-injection vulnerability in `RunnerProcessFactory` on the 2.x line and `RunnerConfigurationFactory` on the 3.x line. These factories combine runner arguments, a caller-controlled target, and caller-controlled arguments into one `ProcessStartInfo.Arguments` string, allowing a double quote in the target or an argument to terminate an operating-system-level quoted region and inject unintended elements into the runner’s argument vector, potentially resulting in arbitrary command execution when a shell runner is used. The vulnerability is patched in `CliInvoke` versions 2.8.5, 2.9.4, 2.10.5, and 3.0.0-beta.2, and in `AlastairLundy.CliInvoke` version 2.0.2. No complete workaround is available; users unable to upgrade can partially mitigate the issue by removing double quotes from targets and arguments, additionally removing shell metacharacters when using shell runners, or bypassing the vulnerable factory and constructing a `ProcessConfiguration` with an explicit `ArgumentList`.","status":"published","published":"2026-09-25T21:17:21.247Z","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-88"],"updated_at":"2026-11-02T14:12:51.721923Z"}],"osv":[{"id":"CVE-2026-100369","title":"CliInvoke: Argument Injection in Extensibility Runner Factory","description":"CliInvoke and its formerly named `AlastairLundy.CliInvoke` package are .NET libraries for invoking command-line programs and wrapping executable processes. `CliInvoke` versions 2.0.0 through 2.8.4, 2.9.0 through 2.9.3, 2.10.0 through 2.10.4, and 3.0.0-alpha.1 through 3.0.0-beta.1, as well as `AlastairLundy.CliInvoke` versions 2.0.0-alpha.1 through 2.0.0, contain an argument-injection vulnerability in `RunnerProcessFactory` on the 2.x line and `RunnerConfigurationFactory` on the 3.x line. These factories combine runner arguments, a caller-controlled target, and caller-controlled arguments into one `ProcessStartInfo.Arguments` string, allowing a double quote in the target or an argument to terminate an operating-system-level quoted region and inject unintended elements into the runner’s argument vector, potentially resulting in arbitrary command execution when a shell runner is used. The vulnerability is patched in `CliInvoke` versions 2.8.5, 2.9.4, 2.10.5, and 3.0.0-beta.2, and in `AlastairLundy.CliInvoke` version 2.0.2. No complete workaround is available; users unable to upgrade can partially mitigate the issue by removing double quotes from targets and arguments, additionally removing shell metacharacters when using shell runners, or bypassing the vulnerable factory and constructing a `ProcessConfiguration` with an explicit `ArgumentList`.","status":"published","published":"2026-09-25T20:26:51.352Z","modified":"2026-10-28T02:30:22.415569793Z","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-88"],"updated_at":"2026-11-02T15:44:53.490346Z"},{"id":"GHSA-j73w-8hfr-4gc9","title":"CliInvoke: Argument Injection in Extensibility Runner Factory","description":"### Impact\nAn argument-injection vulnerability exists in the `CliInvoke`\npackage's runner factory: `RunnerProcessFactory` on the 2.x line and\n`RunnerConfigurationFactory` on the 3.x line.\n\nThe factory joins the runner arguments, the caller's target, and the\ncaller's arguments into a single `ProcessStartInfo.Arguments` string and\nhands it to the OS. The OS command-line parser re-tokenizes the string\nbefore the runner sees it. A double quote (`\"`) in the target or in any\nargument closes the OS-level quoted region and lets the next character\nenter argv as a separate element.\n\n### Patches\nUpgrade to:\n\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.2** (3.x pre-release line)\n\n### Workarounds\nNo complete workaround is available. Until you can upgrade:\n\n- Strip `\"` from any target or argument before passing it to the\n  factory. On shell runners, also strip `;`, `|`, `\u0026`, `$`, backtick,\n  and parentheses.\n- Or bypass the factory entirely and build the `ProcessConfiguration`\n  directly. Set `ArgumentList` explicitly to the argv you want the\n  runner to receive.\n\nThese are partial mitigations. They shift the quoting problem to your\ncode.","status":"published","published":"2026-09-25T21:41:36Z","modified":"2026-09-25T23:00:10.632452553Z","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-88"],"updated_at":"2026-11-02T15:46:49.977351Z"}]}}