Vulnerability DatabaseCVE-2026-84811
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CVE-2026-84811
Published:September 02, 2026
Updated:October 13, 2026
agentverus-scanner fails to analyze compiled Python bytecode files in companion code directories, allowing attackers to bypass security scanning by shipping malicious pycache entries alongside benign source files. Attackers can execute arbitrary Python bytecode on import while the scanner reports a CERTIFIED verdict with high trust scores in both static and semantic analysis modes.
Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (7)
https://github.com/agentverus/agentverus-scanner/issues/27
https://nvd.nist.gov/vuln/detail/CVE-2026-84811
https://github.com/agentverus/agentverus-scanner/blob/v0.8.1/src/scanner/analyzers/semantic.ts
https://github.com/agentverus/agentverus-scanner
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84811.json
https://www.vulncheck.com/advisories/agentverus-scanner-companion-code-analysis-bypass-via-excluded-python-bytecode
https://github.com/agentverus/agentverus-scanner/blob/v0.8.1/src/scanner/companion-code.ts
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CVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Protection Mechanism Failure
CWE-693
EPSS
Base Score:
0.52