What’s Vulnerable › Vulnerabilities

CVE-2026-84810: claude-skill-antivirus Analysis Bypass via Manifest-Only Local Directory Scan

• 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

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 products

• claude-world claude-skill-antivirus: through 2.1.3

References

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

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