CVE-2026-28406
HIGH
GHSA-6rxq-q92g-4rmf
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Lifecycle Timeline
3Tags
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.
Analysis
Path traversal in Kaniko 1.25.4 through 1.25.9 allows attackers to extract tar archives outside the intended destination directory, enabling arbitrary file writes on the build system. When combined with Docker credential helpers in registry authentication scenarios, this vulnerability can be leveraged for code execution within the Kaniko executor process. …
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Remediation
Within 24 hours: Identify all systems running kaniko versions 1.25.4-1.25.9 and assess exposure in CI/CD pipelines. Within 7 days: Upgrade to kaniko version 1.25.10 or later and validate patch deployment across all environments. …
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