CVE-2026-84809 Tencent AI-Infra-Guard skill-scan Analysis Bypass via Excluded Python Bytecode
Attackers can bypass Tencent AI-Infra-Guard's skill-scan by hiding malicious code in excluded Python bytecode files, leading to code execution upon skill installation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-84809?
CVE-2026-84809 is a high-severity vulnerability in Tencent AI-Infra-Guard, published on 2 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-693
Which versions are affected by CVE-2026-84809?
How do I fix CVE-2026-84809?
No fix has been published for CVE-2026-84809 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-84809 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84809 exists.
Sources
Also known as GHSA-7vc4-66f2-3f5f.