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Vulnerabilities CVE-2026-28406

CVE-2026-28406

High
Open
TLP:CLEAR

kaniko has tar archive path traversal in build context extraction allows writing files outside destination directory

NVD CVE.org
Critical Infrastructure

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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.

Details

CVSS Score
8.2
EPSS Score
0.61%

46.2th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Confidence
90%
Published
Feb 27, 2026
Last Modified
Jul 15, 2026
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