What is CVE-2026-84809?

CVE-2026-84809 is a medium-severity vulnerability in Tencent Aig-Skill-Scan, classified under Protection Mechanism Failure. CVSS score: 6.5/10. Published 2026-09-02.

How severe is CVE-2026-84809?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Tencent Aig-Skill-Scan

CVE-2026-84809

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.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-84809?: CVE-2026-84809 is a medium-severity vulnerability in Tencent Aig-Skill-Scan, classified under Protection Mechanism Failure. CVSS score: 6.5/10. Published 2026-09-02.
How severe is CVE-2026-84809?: Medium severity. CVSS v3 base score is 6.5 out of 10.