malcontent OCI image pull credential exfiltration via malicious registry token realm

中 6.5CVE-2026-24845 · GHSA-9m43-p3cx-w8j5 · GO-2026-4392 · 29/01/2026 公開 · 17/06/2026 更新

要点

CVE-2026-24845 は github.com/chainguard-dev/bincapz, github.com/chainguard-dev/malcontent, malcontent (chainguard) に影響する深刻度「中」 (CVSS 6.5) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.38%（全脆弱性の 31.5% より高い）。
対処：1.20.3 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/bincapz Go	`≥ 0.10.0`	修正版なし
github.com/chainguard-dev/malcontent Go	`≥ 0.10.0, < 1.20.3< 1.20.3`	`1.20.3`
malcontent chainguard	`≥ 0.1.0, < 1.20.3`	`1.20.3`

概要

Malcontent could be made to expose Docker registry credentials if it scanned a specially crafted OCI image reference. Malcontent uses google/go-containerregistry for OCI image pulls, which by default uses the Docker credential keychain. A malicious registry could return a WWW-Authenticate header redirecting token authentication to an attacker-controlled endpoint, causing credentials to be sent to that endpoint.

Fix: Default to anonymous auth for OCI pulls

Acknowledgements

Thank you to Oleh Konko from 1seal for discovering and reporting this issue.

NVD の説明

malcontent discovers supply-chain compromises through. context, differential analysis, and YARA. Starting in version 0.10.0 and prior to version 1.20.3, malcontent could be made to expose Docker registry credentials if it scanned a specially crafted OCI image reference. malcontent uses google/go-containerregistry for OCI image pulls, which by default uses the Docker credential keychain. A malicious registry could return a `WWW-Authenticate` header redirecting token authentication to an attacker-controlled endpoint, causing credentials to be sent to that endpoint. Version 1.20.3 fixes the issue by defaulting to anonymous auth for OCI pulls.