CVE-2026-84811CWE-693

CVE-2026-84811

Medium · published September 2, 2026

CVSS v3.1

6.5

EPSS

Percentile

21.0

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 6.5 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0: 7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS: 0.00287 · 21.0th percentile
Weakness: CWE-693 · Protection Mechanism Failure
Published: 2026-09-02T21:18Z

References (5)

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

EPSS history

Timeline

04 SEP 03:44Z
EPSS moved — → 0%
epss
02 SEP 16:59Z
agentverus-scanner Companion Code Analysis Bypass via Excluded Python Bytecode
cvelistv5