melange: Incomplete package integrity verification allows data section substitution

ÉLEVÉE 8.3CVE-2026-54174 · GHSA-fpg8-7664-jc5q · GO-2026-5968 · Published 11/09/2026 · updated 30/09/2026

En bref

CVE-2026-54174 est une vulnérabilité ÉLEVÉE (CVSS 8.3) touchant chainguard.dev/apko, chainguard.dev/melange.
Probabilité d'exploitation dans les 30 prochains jours (EPSS) : 0.15%, plus élevée que 4.7% des vulnérabilités.
Correctif : mettre à jour vers 1.2.9, 0.50.4 ou plus récent.

Package	Affected versions	Patched versions
chainguard.dev/apko Go	`< 1.2.9`	`1.2.9`
chainguard.dev/melange Go	`< 0.50.4`	`0.50.4`

Description

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 description

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.