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CVE-2026-28406

8.2 · HIGH

kaniko is a tool to build container images from a Dockerfile, inside a container or Kubernetes cluster.

Published Feb 27, 2026CWE-22EPSS 0.85%

Overview

CVE-2026-28406 is a high-severity vulnerability. 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, patches, and mitigation guidance. 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.

References

GitHubgithub.com/chainguard-forks/kaniko/commit/a370e4b1f66e6e842b685c8f70ed507964c4b221GitHubgithub.com/chainguard-forks/kaniko/pull/326GitHubgithub.com/chainguard-forks/kaniko/security/advisories/GHSA-6rxq-q92g-4rmfRefaccess.redhat.com/security/cve/CVE-2026-28406Refbugzilla.redhat.com/show_bug.cgi?id=2443462Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28406.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-28406?

CVE-2026-28406 is a high-severity vulnerability. 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, patches, and mitigation guidance. 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 is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-28406 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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