Docker
CVE-2026-28406
HIGH
GHSA-6rxq-q92g-4rmf
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Primary rating from Vendor (github).
CVSS VectorVendor: github
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
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. Docker and Kubernetes environments using the affected Kaniko versions are at risk.
Technical ContextAI
Classified as CWE-22 (Path Traversal). Affects Kaniko. 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 credentia
RemediationAI
A vendor patch is available — apply it immediately. Validate and sanitize file path inputs. Use allowlists. Restrict network access to the affected service where possible.
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Same weakness CWE-22 – Path Traversal
View allVendor StatusVendor
SUSE
Severity: High| Product | Status |
|---|---|
| openSUSE Leap 15.6 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | Fixed |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | Fixed |
| openSUSE Leap 15.5 | Fixed |
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External POC / Exploit Code
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