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

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Summary

CVECVE-2026-42574
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-09 20:16:29 UTC
Updated2026-05-09 20:16:29 UTC
Descriptionapko 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Problem Types: CWE-22 | CWE-59 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | CWE-59 CWE-59: Improper Link Resolution Before File Access ('Link Following')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Chainguard-dev Apko affected >= 0.14.8, < 1.2.5 Not specified

References

ReferenceSourceLinkTags
github.com/chainguard-dev/apko/commit/f5a96e1299ac81c7ea9441705ec4676880... [email protected] github.com
github.com/chainguard-dev/apko/security/advisories/GHSA-qq3r-w4hj-gjp6 [email protected] github.com
github.com/chainguard-dev/apko/pull/2187 [email protected] github.com
github.com/chainguard-dev/apko/releases/tag/v1.2.5 [email protected] github.com
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