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Vulnerabilities CVE-2026-42575

CVE-2026-42575

High
Open
TLP:CLEAR

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

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Description

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 available via ChecksumString(), and the downloaded package control hash is computed, but the two values are never compared in getPackageImpl(). Mismatched packages are silently accepted. An attacker who can substitute download responses (compromised mirror, HTTP repository, poisoned CDN cache) can install arbitrary packages into built images. This issue has been patched in version 1.2.7.

Details

CVSS Score
7.5
EPSS Score
0.16%

5.5th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Confidence
90%
Published
May 9, 2026
Last Modified
May 9, 2026
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