# CVE-2026-28407

## Summary

- **CVE ID:** CVE-2026-28407
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-703
- **Published:** Feb 27, 2026
- **Last Modified:** Mar 12, 2026

## Description

malcontent is software for discovering supply-chain compromises through context, differential analysis, and YARA. Prior to version 1.21.0, malcontent would remove nested archives which failed to extract which could potentially leave malicious content. A better approach is to preserve these archives so that malcontent can attempt a best-effort scan of the archive bytes. Version 1.21.0 fixes the issue.

## Affected Products

- chainguard-dev — malcontent (< 1.21.0)

## References

- [CNA](https://github.com/chainguard-dev/malcontent/security/advisories/GHSA-945p-3jhm-6rcp)
- [CNA](https://github.com/chainguard-dev/malcontent/pull/1383)
- [CNA](https://github.com/chainguard-dev/malcontent/commit/356c56659ccfcad0b249a97de8cf71f151ed3ee9)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.35%
- **EPSS Percentile:** 28.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._