Summaryinfo

A vulnerability was found in ParzivalHack PySpector up to 0.1.6 and classified as critical. This affects the function validate_plugin_code of the file plugin_system.py of the component API Call Handler. Such manipulation leads to incomplete blacklist. This vulnerability is listed as CVE-2026-33139. The attack must be carried out locally. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in ParzivalHack PySpector up to 0.1.6. Affected by this issue is the function validate_plugin_code of the file plugin_system.py of the component API Call Handler. The manipulation with an unknown input leads to a incomplete blacklist vulnerability. Using CWE to declare the problem leads to CWE-184. The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete, leading to resultant weaknesses. Impacted is confidentiality, integrity, and availability. CVE summarizes:

PySpector is a static analysis security testing (SAST) Framework engineered for modern Python development workflows. PySpector versions 0.1.6 and prior are affected by a security validation bypass in the plugin system. The validate_plugin_code() function in plugin_system.py, performs static AST analysis to block dangerous API calls before a plugin is trusted and executed. However, the internal resolve_name() helper only handles ast.Name and ast.Attribute node types, returning None for all others. When a plugin uses indirect function calls via getattr() (such as getattr(os, 'system')) the outer call's func node is of type ast.Call, causing resolve_name() to return None, and the security check to be silently skipped. The plugin incorrectly passes the trust workflow, and executes arbitrary system commands on the user's machine when loaded. This issue has been patched in version 0.1.7.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-33139 since 03/17/2026. The exploitation is known to be easy. Local access is required to approach this attack. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1562.006 by the MITRE ATT&CK project.

Upgrading to version 0.1.7 eliminates this vulnerability.

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Productinfo

Vendor

• ParzivalHack

Name

• PySpector

Version

• 0.1.0
• 0.1.1
• 0.1.2
• 0.1.3
• 0.1.4
• 0.1.5
• 0.1.6

Website

• Product: https://github.com/ParzivalHack/PySpector/

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