CVE-2026-28406
8.2 · HIGHOverview
CVE-2026-28406 is a high-severity vulnerability affecting chainguard kaniko. It was published on February 27, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
kaniko is a tool to build container images from a Dockerfile, inside a container or Kubernetes cluster. Starting in version 1.25.4 and prior to version 1.25.10, kaniko unpacks build context archives using `filepath.Join(dest, cleanedName)` without enforcing that the final path stays within `dest`. A tar entry like `../outside.txt` escapes the extraction root and writes files outside the destination directory. In environments with registry authentication, this can be chained with docker credential helpers to achieve code execution within the executor process. Version 1.25.10 uses securejoin for path resolution in tar extraction.
Remediation
Check the references section for vendor advisories and patches from chainguard. Update kaniko to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| chainguard | kaniko | >= 1.25.4, < 1.25.10 | Affected |
References
Frequently Asked Questions
What is CVE-2026-28406?
CVE-2026-28406 is a high-severity vulnerability affecting chainguard kaniko. It was published on February 27, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).
How severe is CVE-2026-28406?
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-28406?
Check the references section for vendor advisories and patches from chainguard. Update kaniko to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-28406?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-28406 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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