CVE-2026-84809Public exploitNetwork attack vectorHinoki check available

Malicious code execution via excluded Python bytecode

Published Sep 2, 2026 · Updated Sep 2, 2026

Analysis bypass in Tencent AI-Infra-Guard and aig-skill-scan allows remote attackers to hide executable Python bytecode from audits. The dir_tree, _build_repo_tree, and pre_scan surfaces skip pycache directories and .pyc, .pyo, and .pyd files, leaving the auditing model blind to runtime-reachable code. Exploitation requires an operator to scan and then install an attacker-supplied skill; Python imports the hidden bytecode and executes its payload.

CVSS severity7.1
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Analysis bypass in Tencent AI-Infra-Guard and aig-skill-scan allows remote attackers to hide executable Python bytecode from audits. The dir_tree, _build_repo_tree, and pre_scan surfaces skip pycache directories and .pyc, .pyo, and .pyd files, leaving the auditing model blind to runtime-reachable code. Exploitation requires an operator to scan and then install an attacker-supplied skill; Python imports the hidden bytecode and executes its payload.

The record

CVE
CVE-2026-84809
Published
Sep 2, 2026
Updated
Sep 2, 2026
Vendor
Tencent
Product
AI-Infra-Guard
Classifications
CWE-693, T1195.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.5.2
  2. Affected versionversion=4.6.0 <=4.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tencent · AI-Infra-Guardversion=0 <4.5.2; version=4.6.0 <=4.6.0
Tencent · aig-skill-scanversion=0 <=0.2.1

Published CVSS scores

6.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
7.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1195.002Compromise Software Supply Chain

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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