apko allows users to build and publish OCI container images built from apk packages. Starting in version 0.27.0 and prior to version 0.29.5, critical files were inadvertently set to 0666, which could likely be abused for root escalation. Version 0.29.5 contains a fix for the issue.
https://github.com/chainguard-dev/apko/security/advisories/GHSA-x6ph-r535-3vjw
https://github.com/chainguard-dev/apko/releases/tag/v0.29.5
https://github.com/chainguard-dev/apko/releases/tag/v0.27.0
https://github.com/chainguard-dev/apko/commit/aedb0772d6bf6e74d8f17690946dbc791d0f6af3
https://github.com/chainguard-dev/apko/commit/04f37e2d50d5a502e155788561fb7d40de705bd9