CVE-2026-42574

HIGH7.5

apko dirFS has a symlink-following path traversal that allows multiple entry points to escape the build root

Published May 9, 2026

Modified 5 days ago

Details

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.

References

WEB

https://github.com/chainguard-dev/apko/commit/f5a96e1299ac81c7ea9441705ec467688086f442

WEB

https://github.com/chainguard-dev/apko/pull/2187

WEB

https://github.com/chainguard-dev/apko/releases/tag/v1.2.5

WEB

https://github.com/chainguard-dev/apko/security/advisories/GHSA-qq3r-w4hj-gjp6

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-42574

CVSS Analysis