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CVE-2026-84809

Tencent AI-Infra-Guard skill-scan Analysis Bypass via Excluded Python Bytecode

CVSS 4.0 7.1 HIGHCVSS 3.1 6.5 MEDIUMCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-84809

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-84809

Published

AI-Infra-Guard

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Tencent",
                    "product": "AI-Infra-Guard",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0",
                            "lessThan": "4.5.2",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.6.0",
                            "lessThanOrEqual": "4.6.0",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "packageURL": "pkg:github/Tencent/AI-Infra-Guard"
                }

aig-skill-scan

https://pypi.org

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Tencent",
                    "product": "aig-skill-scan",
                    "collectionURL": "https://pypi.org",
                    "packageName": "aig-skill-scan",
                    "defaultStatus": "unaffected",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "0.2.1",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ],
                    "packageURL": "pkg:pypi/aig-skill-scan"
                }

Original source record · Cite this exact observation · Complete original publisher JSON