Vulnerability · Published Sep 2, 2026 · Assigned by VulnCheck

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

Medium 6.5

In plain English

A medium-severity security flaw in agentverus-scanner from agentverus. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.5%top 55.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
agentverus	agentverus-scanner	0 – through 0.8.1

Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

References

GitHub Issue #27 issue-tracking
https://github.com/agentverus/agentverus-scanner/blob/v0.8.1/src/scanner/companion-code.ts technical-description
https://github.com/agentverus/agentverus-scanner/blob/v0.8.1/src/scanner/analyzers/semantic.ts technical-description
https://github.com/agentverus/agentverus-scanner product
VulnCheck Advisory: agentverus-scanner Companion Code Analysis Bypass via Excluded Python Bytecode third-party-advisory