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CVE-2026-33623— PinchTab: OS Command Injection via Profile Name in Windows Cleanup Routine Enables Arbitrary Command Execution

Quick assessment

Affected
pinchtab pinchtab
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pinchtab是Pinchtab开源的一个AI代理浏览器控制工具。 pinchtab 0.8.4版本存在资源管理错误漏洞，该漏洞源于Windows清理路径存在命令注入，可能导致任意PowerShell命令执行。

CVSS 6.7 · Medium EPSS 3.02% · P87

Possible ATT&CK Techniques 1 AI

T1059.001 · PowerShell
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I. Basic Information for CVE-2026-33623

Vulnerability Information
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Vulnerability Title
PinchTab: OS Command Injection via Profile Name in Windows Cleanup Routine Enables Arbitrary Command Execution
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
pinchtab 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pinchtab是Pinchtab开源的一个AI代理浏览器控制工具。 pinchtab 0.8.4版本存在资源管理错误漏洞，该漏洞源于Windows清理路径存在命令注入，可能导致任意PowerShell命令执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pinchtab pinchtab < 0.8.5 -

II. Public POCs for CVE-2026-33623

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III. Intelligence Information for CVE-2026-33623

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Patches & Fixes for CVE-2026-33623 (1)

Vendor Advisories for CVE-2026-33623 (1)

Same Patch Batch · pinchtab · 2026-03-26 · 5 CVEs total

CVE-2026-33621 4.8 MEDIUM PinchTab: Unapplied Rate Limiting Middleware Allows Unbounded Brute-Force of API Token
CVE-2026-33620 4.3 MEDIUM PinchTab: API Bearer Token Exposed in URL Query Parameter via Server Logs and Intermediary
CVE-2026-33619 4.1 MEDIUM PinchTab has Unauthenticated Blind SSRF in Task Scheduler via Unvalidated callbackUrl
CVE-2026-33622 A PinchTab Security Policy Bypass in /wait Allows Arbitrary JavaScript Execution

IV. Related Vulnerabilities

Same product: pinchtab
Same vendor: pinchtab
Same weakness: CWE-78