CVE-2026-33139CWE-184

PySpector: Plugin Sandbox Bypass leads to Arbitrary Code Execution

High · published March 20, 2026

CVSS v4.0
8.3
EPSS
0%
Percentile
8.0
In the wild
Unconfirmed
What it is

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 record
Technical detail
CVSS v4.0
8.3 · HIGH
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
EPSS
0.00188 · 8.0th percentile
Weakness
CWE-184 · Incomplete List of Disallowed Inputs
Published
2026-03-20T19:59Z
EPSS history
Timeline
  • 20 MAR 19:59Z
    PySpector: Plugin Sandbox Bypass leads to Arbitrary Code Execution
    cvelistv5