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1 vulnerability by chainguard-forks

CVE-2026-28406 (GCVE-0-2026-28406)

Vulnerability from cvelistv5 – Published: 2026-02-27 21:20 – Updated: 2026-02-27 21:20
VLAI?
Title
kaniko has tar archive path traversal in build context extraction allows writing files outside destination directory
Summary
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.
Severity ?
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version
chainguard-forks kaniko Affected: >= 1.25.4, < 1.25.10
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "kaniko",
          "vendor": "chainguard-forks",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.25.4, \u003c 1.25.10"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-27T21:20:52.764Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/chainguard-forks/kaniko/security/advisories/GHSA-6rxq-q92g-4rmf",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/chainguard-forks/kaniko/security/advisories/GHSA-6rxq-q92g-4rmf"
        },
        {
          "name": "https://github.com/chainguard-forks/kaniko/pull/326",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/chainguard-forks/kaniko/pull/326"
        },
        {
          "name": "https://github.com/chainguard-forks/kaniko/commit/a370e4b1f66e6e842b685c8f70ed507964c4b221",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/chainguard-forks/kaniko/commit/a370e4b1f66e6e842b685c8f70ed507964c4b221"
        }
      ],
      "source": {
        "advisory": "GHSA-6rxq-q92g-4rmf",
        "discovery": "UNKNOWN"
      },
      "title": "kaniko has tar archive path traversal in build context extraction allows writing files outside destination directory"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-28406",
    "datePublished": "2026-02-27T21:20:52.764Z",
    "dateReserved": "2026-02-27T15:33:57.289Z",
    "dateUpdated": "2026-02-27T21:20:52.764Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}