CVE-2026-84810

Summary

claude-skill-antivirus fails to analyze executable files when scanning local skill directories, reading only SKILL.md while ignoring Python source, bytecode, and other artifacts in the scripts directory. Attackers can distribute skills with malicious code in non-manifest files that receive a SAFE verdict with 100/100 trust score despite containing unanalyzed executable payloads.

Affected Software

Weaknesses

• CWE-693: Protection Mechanism Failure

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/nedlir/skills-scanner-bypass

References

• https://github.com/claude-world/claude-skill-antivirus/issues/33
• https://github.com/claude-world/claude-skill-antivirus/blob/v2.1.3/src/utils/downloader.js
• https://github.com/claude-world/claude-skill-antivirus/blob/v2.1.3/src/scanner/index.js
• https://github.com/claude-world/claude-skill-antivirus
• https://www.vulncheck.com/advisories/claude-skill-antivirus-analysis-bypass-via-manifest-only-local-directory-scan

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