CVE-2026-100369: alastairlundy CliInvoke · Argument Injection
Affects alastairlundy CliInvokeSource CVE Database V5
Not known to be exploited · CVSS 8.4 High · fixed in 2.8.5 : patch alastairlundy CliInvoke soon.
Data as of 7 Nov 2026, 23:24 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 2.8.5
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 25 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 8 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| alastairlundyCliInvoke | Affected
| Fixed in– |
| alastairlundyAlastairLundy.CliInvoke | Affected
| Fixed in– |
NuGetalastairlundy.cliinvokepkg:nuget/alastairlundy.cliinvokeOther threats | Affected
| Fixed in– |
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AI-suggested
A fix is available in CliInvoke versions 2.8.5, 2.9.4, 2.10.5, and 3.0.0-beta.2, and AlastairLundy.CliInvoke version 2.0.2. Users are strongly advised to upgrade to these patched versions. No complete workaround exists. Users unable to upgrade can partially mitigate the risk by removing double quotes from targets and arguments, removing shell metacharacters when using shell runners, or bypassing the vulnerable factories by constructing a ProcessConfiguration with an explicit ArgumentList.
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`.