Description
Tencent AI-Infra-Guard's skill-scan component excludes compiled Python bytecode files from analysis by hardcoding __pycache__ directories and .pyc/.pyo/.pyd extensions into skip lists across multiple scanning surfaces. Attackers can distribute skills with benign Python source files alongside malicious compiled bytecode that executes on import while the scanner reports a safe verdict, enabling code execution when operators install the skill.
References7
- github.com/Tencent/AI-Infra-Guard
- github.com/Tencent/AI-Infra-Guard/blob/v4.6.0/skill-scan/skill_…
- github.com/Tencent/AI-Infra-Guard/blob/v4.6.0/skill-scan/skill_…
- github.com/Tencent/AI-Infra-Guard/commit/7e0f749e3c023e5c6ab7b3…
- github.com/Tencent/AI-Infra-Guard/issues/531
- www.vulncheck.com/advisories/tencent-ai-infra-guard-skill-scan-…
- github.com/Tencent/AI-Infra-Guard/issues/531
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - CVSS 4.0
-
7.1
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 1% percentile: 47 · as of 3 November 2026
- CWE
- CWE-693
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.