CVE-2026-100369
HighCVSS 8.4Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
CliInvoke (and its formerly named AlastairLundy.CliInvoke) are .NET libraries for invoking command-line programs. Versions 2.0.0-2.8.4, 2.9.0-2.9.3, 2.10.0-2.10.4, 3.0.0-alpha.1-3.0.0-beta.1 (CliInvoke) and 2.0.0-alpha.1-2.0.0 (AlastairLundy.CliInvoke) contain an argument-injection vulnerability in `RunnerProcessFactory` (2.x line) and `RunnerConfigurationFactory` (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 to break quoting and inject unintended elements into the runner's argument vector, potentially resulting in arbitrary command execution.
Risk Assessment
An attacker can execute arbitrary commands in the context of the host process, potentially leading to system compromise or data theft.
Recommendation
Upgrade CliInvoke to version 2.8.5, 2.9.4, 2.10.5, or 3.0.0-beta.2, and AlastairLundy.CliInvoke to 2.0.2. If unable to upgrade, remove double quotes from targets and arguments, additionally remove shell metacharacters when using shell runners, or bypass the vulnerable factory and construct a `ProcessConfiguration` with an explicit `ArgumentList`.
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Original NVD description (English source)
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`.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

