melange: Incomplete package integrity verification allows data section substitution

高 8.3CVE-2026-54174 · GHSA-fpg8-7664-jc5q · GO-2026-5968 · 11/09/2026 公開 · 30/09/2026 更新

要点

CVE-2026-54174 は chainguard.dev/apko, chainguard.dev/melange に影響する深刻度「高」 (CVSS 8.3) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.15%（全脆弱性の 4.6% より高い）。
対処：1.2.9, 0.50.4 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
chainguard.dev/apko Go	`< 1.2.9`	`1.2.9`
chainguard.dev/melange Go	`< 0.50.4`	`0.50.4`

概要

Previously, Apko verified the control section hash (.PKGINFO etc.) against the signed APKINDEX, but never verified the data section hash (the actual package files that get installed). An attacker who could compromise a mirror, poison a cache, or MITM a package fetch could substitute arbitrary file contents while the control hash check still passed.

NVD の説明

melange allows users to build apk packages using declarative pipelines. Apko prior to version 1.2.9, corresponding to melange prior to version 0.50.4, verified the control section hash (`.PKGINFO` etc.) against the signed `APKINDEX`, but never verified the data section hash (the actual package files that get installed). An attacker who could compromise a mirror, poison a cache, or MITM a package fetch could substitute arbitrary file contents while the control hash check still passed. Apko version 1.2.9 and melange version 0.50.4 contain a fix.