What’s Vulnerable › Vulnerabilities

CVE-2026-84811: agentverus-scanner Companion Code Analysis Bypass via Excluded Python Bytecode

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-02 · updated 2026-09-23
• Weakness: CWE-693

Description

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.

Affected products

• agentverus-scanner: through 0.8.1

References

• https://github.com/agentverus/agentverus-scanner
• https://github.com/agentverus/agentverus-scanner/blob/v0.8.1/src/scanner/analyzers/semantic.ts
• https://github.com/agentverus/agentverus-scanner/blob/v0.8.1/src/scanner/companion-code.ts
• https://github.com/agentverus/agentverus-scanner/issues/27
• https://www.vulncheck.com/advisories/agentverus-scanner-companion-code-analysis-bypass-via-excluded-python-bytecode

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