malcontent vulnerable to symlink Path Traversal via handleSymlink argument confusion in archive extraction

TRUNG BÌNH 5.0CVE-2026-24846 · GHSA-923j-vrcg-hxwh · GO-2026-4391 · Công bố 29/01/2026 · cập nhật 17/06/2026

Tóm tắt nhanh

CVE-2026-24846 là lỗ hổng mức TRUNG BÌNH (CVSS 5.0) ảnh hưởng github.com/chainguard-dev/malcontent, malcontent (chainguard).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.19%, cao hơn 8.3% các lỗ hổng khác.
Cách xử lý: cập nhật lên 1.20.3 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
github.com/chainguard-dev/malcontent Go	`≥ 1.8.0, < 1.20.3`	`1.20.3`
malcontent chainguard	`≥ 1.8.0, < 1.20.3`	`1.20.3`

Mô tả

malcontent could be made to create symlinks outside the intended extraction directory when scanning a specially crafted tar or deb archive. The handleSymlink function received arguments in the wrong order, causing the symlink target to be used as the symlink location. Additionally, symlink targets were not validated to ensure they resolved within the extraction directory.

Fixes:

Acknowledgements

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

Mô tả của NVD

malcontent discovers supply-chain compromises through. context, differential analysis, and YARA. Starting in version 1.8.0 and prior to version 1.20.3, malcontent could be made to create symlinks outside the intended extraction directory when scanning a specially crafted tar or deb archive. The `handleSymlink` function received arguments in the wrong order, causing the symlink target to be used as the symlink location. Additionally, symlink targets were not validated to ensure they resolved within the extraction directory. Version 1.20.3 introduces fixes that swap handleSymlink arguments, validate symlink location, and validate symlink targets that resolve within an extraction directory.