{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-84809", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-02T10:19:32.992Z", "datePublished": "2026-09-02T16:59:48.800Z", "dateUpdated": "2026-09-02T16:59:48.800Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-02T16:59:48.800Z"}, "datePublic": "2026-08-10T00:00:00.000Z", "title": "Tencent AI-Infra-Guard skill-scan Analysis Bypass via Excluded Python Bytecode", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Protection Mechanism Failure", "cweId": "CWE-693", "type": "CWE"}]}], "affected": [{"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"}, {"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"}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:tencent:ai-infra-guard:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.5.2"}, {"vulnerable": true, "criteria": "cpe:2.3:a:tencent:ai-infra-guard:4.6.0:*:*:*:*:*:*:*"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "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", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7.1, "baseSeverity": "HIGH"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/Tencent/AI-Infra-Guard/issues/531", "tags": ["issue-tracking"], "name": "GitHub Issue #531"}, {"url": "https://github.com/Tencent/AI-Infra-Guard/commit/7e0f749e3c023e5c6ab7b32fe97b3f6f2e8aeb04", "tags": ["patch"]}, {"url": "https://github.com/Tencent/AI-Infra-Guard/blob/v4.6.0/skill-scan/skill_scan/tools/dir/dir_actions.py", "tags": ["technical-description"]}, {"url": "https://github.com/Tencent/AI-Infra-Guard/blob/v4.6.0/skill-scan/skill_scan/utils/pre_scan.py", "tags": ["technical-description"]}, {"url": "https://github.com/Tencent/AI-Infra-Guard", "tags": ["product"]}, {"name": "VulnCheck Advisory: Tencent AI-Infra-Guard skill-scan Analysis Bypass via Excluded Python Bytecode", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/tencent-ai-infra-guard-skill-scan-analysis-bypass-via-excluded-python-bytecode"}], "credits": [{"lang": "en", "value": "nedlir", "type": "reporter"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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