Symlink Attack Affecting chainguard.dev/apko/pkg/apk/fs package, versions >=0.14.8 <1.2.5
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-GOLANG-CHAINGUARDDEVAPKOPKGAPKFS-16419397
- published6 May 2026
- disclosed4 May 2026
- credit1seal
Introduced: 4 May 2026
NewCVE-2026-42574 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade chainguard.dev/apko/pkg/apk/fs to version 1.2.5 or higher.
Overview
Affected versions of this package are vulnerable to Symlink Attack through the DirFS process. An attacker can gain unauthorized access to files outside the intended build root by crafting a malicious archive containing a symlink entry that points outside the build root, followed by directory creation or file write operations that traverse the symlink.