CVE-2026-42575 apko doesn't verify downloaded apk packages against APKINDEX checksum (package substitution possible)

apko allows users to build and publish OCI container images built from apk packages. Prior to version 1.2.7, apko verifies the signature on APKINDEX.tar.gz but never compares individually downloaded .apk packages against the checksum recorded in the signed index. The checksum is parsed and...