EUVD-2026-70226
GHSA-7r9q-g8p5-w7pp
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-distributed malicious package; low complexity; no attacker privileges; victim must import package (UI:R); scope changes to victim runtime where RCE achieves full C/I/A impact.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
Lifecycle Timeline
2DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
Python bytecode scanning gap in agentverus-scanner allows supply-chain attackers to smuggle malicious __pycache__ .pyc files past the tool's static and semantic analysis engines, which only inspect source .py files in companion code directories. Packages carrying malicious bytecode alongside benign source receive a CERTIFIED verdict with elevated trust scores, causing downstream environments that trust the scanner to silently execute attacker-controlled code on import. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim organization uses agentverus-scanner as a gate for approving Python packages and that the attacker can introduce a package into a registry or path the scanner evaluates. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 7.1 (AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N) captures only the scanner's own system impact - a false-positive CERTIFIED verdict - and omits subsequent system RCE, which is the actual realized harm. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patched version is independently confirmed at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Audit all packages previously flagged as CERTIFIED by agentverus-scanner in the past 90 days and check __pycache__ directories for unexpected or suspicious .pyc files; immediately suspend automated trust in scanner verdicts until investigation is complete. …
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External POC / Exploit Code
Leaving vuln.today