malcontent: Nested archive extraction failure can drop content from scan inputs

中 5.3CVE-2026-28407 · GHSA-945p-3jhm-6rcp · GO-2026-4577 · 27/02/2026 公開 · 17/06/2026 更新

要点

CVE-2026-28407 は github.com/chainguard-dev/malcontent, malcontent (chainguard) に影響する深刻度「中」 (CVSS 5.3) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.41%（全脆弱性の 35.3% より高い）。
対処：1.21.0 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
github.com/chainguard-dev/malcontent Go	`< 1.21.0`	`1.21.0`
malcontent chainguard	`< 1.21.0`	`1.21.0`

概要

Previously, 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.

Fix: https://github.com/chainguard-dev/malcontent/pull/1383

Acknowledgements

malcontent thanks Oleh Konko from 1seal for discovering and reporting this issue.

NVD の説明

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.