Vulnerability · Published Mar 26, 2026 · Assigned by GitHub_M
CVE-2026-33623PinchTab: OS Command Injection via Profile Name in Windows Cleanup Routine Enables Arbitrary Command Execution
Medium 6.7
In plain English
A medium-severity OS command injection in pinchtab from pinchtab. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 3.0% (higher than 87% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab `v0.8.4` contains a Windows-only command injection issue in the orphaned Chrome cleanup path. When an instance is stopped, the Windows cleanup routine builds a PowerShell `-Command` string using a `needle` derived from the profile path. In `v0.8.4`, that string interpolation escapes backslashes but does not safely neutralize other PowerShell metacharacters. If an attacker can launch an instance using a crafted profile name and then trigger the cleanup path, they may be able to execute arbitrary PowerShell commands on the Windows host in the security context of the PinchTab process user. This is not an unauthenticated internet RCE. It requires authenticated, administrative-equivalent API access to instance lifecycle endpoints, and the resulting command execution inherits the permissions of the PinchTab OS user rather than bypassing host privilege boundaries. Version 0.8.5 contains a patch for the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/pinchtab/pinchtab | 0.8.5 | GO-2026-4823 |
| Go | github.com/pinchtab/pinchtab | 0.8.5 | GHSA-p8mm-644p-phmh |
| Go | github.com/pinchtab/pinchtab/cmd/pinchtab | 0.8.5 | GHSA-p8mm-644p-phmh |
Affected products (as reported)
Weakness: CWE-78, CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L