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Vulnerability record · CVE-2026-84810 · published 2 September 2026

CVE-2026-84810: claude-skill-antivirus fails to analyze executable files when scanning local skill directories, reading only S…

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.

7.1 CVSS 4.0 High EPSS 0.32% · top 77.7% CWE-693 · CWE-693 Deferred
7.1CVSS 4.0 base score
0.32%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
23 Sep 2026Last modified by NVD

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.

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:

References

LinkTags
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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Source: NIST National Vulnerability Database (record CVE-2026-84810), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.