Vulnerabilities in pkg:golang/github.com/chainguard-dev/kaniko

PACKAGE
Advisory Identifier: GHSA-6rxq-q92g-4rmf
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Advisory Summary

CVE-2026-28406 is a HIGH (CVSS 8.2) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Github.com/chainguard dev/kaniko libraries in the Go ecosystem. The issue involves kaniko has tar archive path traversal in its build context extraction, allowing file writes outside destination directories. Remediation is available by upgrading affected packages to version 1.25.10.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:golang/github.com/chainguard-dev/kaniko

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:golang/github.com/chainguard-dev/kaniko. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-6rxq-q92g-4rmf CVE-2026-28406 HIGH kaniko has tar archive path traversal in its build context extraction, allowing file writes outside destination directories

CVE-2026-28406 at a Glance

CVE Identifier CVE-2026-28406
GHSA Identifier GHSA-6rxq-q92g-4rmf
Severity HIGH
CVSS v3.1 Base Score 8.2
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Github.com/chainguard dev/kaniko
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 8.2

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability Low (A:L)

How to Fix CVE-2026-28406

To remediate this vulnerability, upgrade all affected Github.com/chainguard dev/kaniko dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/chainguard-dev/kaniko fixed: 1.25.10 
Upgrade github.com/chainguard-dev/kaniko to 1.25.10
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/chainguard-dev/kaniko

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-28406, inspect your project dependencies for Github.com/chainguard dev/kaniko:

inspect dependencies for github.com/chainguard-dev/kaniko

Analyze the terminal output to locate any version of Github.com/chainguard dev/kaniko in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.25.10), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Github.com/chainguard dev/kaniko, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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. Affected versions >= 1.25.4, <= 1.25.9. **Fix:** Merged with [PR #326](https://github.com/chainguard-forks/kaniko/pull/326) — uses securejoin for path resolution in tar extraction. **Acknowledgements** kaniko thanks Oleh Konko from [1seal](https://1seal.org/) for discovering and reporting this issue.

CVE-2026-28406 Affected Github.com/chainguard dev/kaniko Versions

1 component(s)
Fixed Versions:
1.25.10
Product / Package Ecosystem Affected Versions Fixed Version
github.com/chainguard-dev/kaniko
golang/github.com/chainguard-dev/kaniko
Go
≥ 1.25.4
< 1.25.10
1.25.10

References

GitHub Advisory / Wiki ADVISORY
https://github.com/chainguard-forks/kaniko/security/advisories/GHSA-6rxq-q92g-4rmf
NVD — CVE-2026-28406 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28406
Github.com/chainguard dev/kaniko Source Repository REPOSITORY
https://github.com/chainguard-forks/kaniko/pull/326
Security Fix Commit FIX COMMIT
https://github.com/chainguard-forks/kaniko/commit/a370e4b1f66e6e842b685c8f70ed507964c4b221
Github.com/chainguard dev/kaniko Source Repository REPOSITORY
https://github.com/chainguard-forks/kaniko
Github.com/chainguard dev/kaniko Release RELEASE
https://github.com/chainguard-forks/kaniko/releases/tag/v1.25.10

Frequently Asked Questions

What is CVE-2026-28406?
CVE-2026-28406 is a security vulnerability in Github.com/chainguard dev/kaniko involving kaniko has tar archive path traversal in its build context extraction, allowing file writes outside destination directories under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Github.com/chainguard dev/kaniko versions are affected?
Affected versions include releases prior to 1.25.10 across affected packages: github.com/chainguard-dev/kaniko.
What version fixes CVE-2026-28406?
Upgrading to 1.25.10 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/chainguard-dev/kaniko affected?
Yes, github.com/chainguard-dev/kaniko is affected in releases prior to 1.25.10. Upgrade your dependency to 1.25.10 or later.
What is the CVSS score of CVE-2026-28406?
CVE-2026-28406 has a CVSS v3.1 base score of 8.2 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L.
What CWE is associated with CVE-2026-28406?
CVE-2026-28406 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Go dependencies for CVE-2026-28406?
Run the dependency tree command: 'inspect dependencies for github.com/chainguard-dev/kaniko'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-6rxq-q92g-4rmf",
  "modified" : "2026-03-01T01:28:02Z",
  "published" : "2026-03-01T01:28:02Z",
  "aliases" : [ "CVE-2026-28406" ],
  "summary" : "kaniko has tar archive path traversal in its build context extraction, allowing file writes outside destination directories",
  "details" : "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. Affected versions >= 1.25.4, <= 1.25.9.\n\n**Fix:** Merged with [PR #326](https://github.com/chainguard-forks/kaniko/pull/326) — uses securejoin for path resolution in tar extraction.\n\n**Acknowledgements**\n\nkaniko thanks Oleh Konko from [1seal](https://1seal.org/) for discovering and reporting this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/chainguard-dev/kaniko"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.25.4"
      }, {
        "fixed" : "1.25.10"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/chainguard-forks/kaniko/security/advisories/GHSA-6rxq-q92g-4rmf"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-28406"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chainguard-forks/kaniko/pull/326"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chainguard-forks/kaniko/commit/a370e4b1f66e6e842b685c8f70ed507964c4b221"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/chainguard-forks/kaniko"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chainguard-forks/kaniko/releases/tag/v1.25.10"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-01T01:28:02Z",
    "nvd_published_at" : "2026-02-27T22:16:23Z"
  }
}