CVE-2026-42574
High
Description
apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before version 1.2.5, a crafted .apk could install a TypeSymlink tar entry whose target pointed outside the build root, and a subsequent directory-creation or file-write entry in the same or later archive could traverse that symlink to reach host paths the build user could write to. This issue has been patched in version 1.2.5.
SeverityHigh
CVSS7.5
Exploit probability—
ProductChainguard.dev/apko
PublishedMay 9, 2026
First seenMay 9, 2026
Weakness typeCWE-22Path traversalCWE-59Improper link resolution
How to fix
Update
- chainguard.dev/apko1.2.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| chainguard.dev/apkoGo | 0.14.8 ≤ v < 1.2.5 | 1.2.5 |
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