CVE-2026-41206: CWE-184: Incomplete List of Disallowed Inputs in ParzivalHack PySpector
PySpector versions prior to 0. 1. 8 contain a vulnerability in the plugin security validator where the blocklist for disallowed inputs is incomplete. This allows an attacker who can supply a plugin file to bypass the blocklist using certain unchecked Python constructs, leading to arbitrary code execution within the PySpector process when the malicious plugin is installed and run. The issue is fixed in version 0. 1. 8.
AI Analysis
Technical Summary
PySpector is a static analysis security testing framework for Python that uses AST-based analysis to prevent dangerous plugins. Before version 0.1.8, the method PluginSecurity.validate_plugin_code employed an incomplete blocklist that failed to detect several Python constructs, enabling attackers to bypass restrictions. This vulnerability (CWE-184) allows arbitrary code execution if an attacker can supply a plugin file to the system. The vulnerability is addressed in PySpector version 0.1.8.
Potential Impact
An attacker with the ability to supply a plugin file to PySpector versions earlier than 0.1.8 can bypass the incomplete blocklist and execute arbitrary code within the PySpector process. This could compromise the integrity and security of the environment running PySpector. The CVSS 4.0 score is 6.9 (medium severity), reflecting the local attack vector with low privileges required but high impact on confidentiality and integrity.
Mitigation Recommendations
Upgrade PySpector to version 0.1.8 or later, where the incomplete blocklist issue in PluginSecurity.validate_plugin_code has been fixed. No other mitigation guidance is provided. Patch status is not explicitly stated but the fix is available in version 0.1.8, so updating to this version is the recommended remediation.
CVE-2026-41206: CWE-184: Incomplete List of Disallowed Inputs in ParzivalHack PySpector
Description
PySpector versions prior to 0. 1. 8 contain a vulnerability in the plugin security validator where the blocklist for disallowed inputs is incomplete. This allows an attacker who can supply a plugin file to bypass the blocklist using certain unchecked Python constructs, leading to arbitrary code execution within the PySpector process when the malicious plugin is installed and run. The issue is fixed in version 0. 1. 8.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
PySpector is a static analysis security testing framework for Python that uses AST-based analysis to prevent dangerous plugins. Before version 0.1.8, the method PluginSecurity.validate_plugin_code employed an incomplete blocklist that failed to detect several Python constructs, enabling attackers to bypass restrictions. This vulnerability (CWE-184) allows arbitrary code execution if an attacker can supply a plugin file to the system. The vulnerability is addressed in PySpector version 0.1.8.
Potential Impact
An attacker with the ability to supply a plugin file to PySpector versions earlier than 0.1.8 can bypass the incomplete blocklist and execute arbitrary code within the PySpector process. This could compromise the integrity and security of the environment running PySpector. The CVSS 4.0 score is 6.9 (medium severity), reflecting the local attack vector with low privileges required but high impact on confidentiality and integrity.
Mitigation Recommendations
Upgrade PySpector to version 0.1.8 or later, where the incomplete blocklist issue in PluginSecurity.validate_plugin_code has been fixed. No other mitigation guidance is provided. Patch status is not explicitly stated but the fix is available in version 0.1.8, so updating to this version is the recommended remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-18T02:51:52.974Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e9707c87115cfb6852213f
Added to database: 4/23/2026, 1:06:04 AM
Last enriched: 4/23/2026, 1:22:21 AM
Last updated: 4/23/2026, 3:53:23 AM
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.