{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "chainguard.dev/melange"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.11.3"
            },
            {
              "fixed": "0.40.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-24843"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-03T23:47:29Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "An attacker who can influence the tar stream from a QEMU guest VM could write files outside the intended workspace directory on the host. The `retrieveWorkspace` function extracts tar entries without validating that paths stay within the workspace, allowing Path Traversal via `../` sequences.\n\n**Fix:** Fixed in [6e243d0d](https://github.com/chainguard-dev/melange/commit/6e243d0d46699f837d7c392397a694d2bcc7612b). Merged in release.\n\n**Acknowledgements**\n\nmelange thanks Oleh Konko from [1seal](https://1seal.org/) for discovering and reporting this issue.",
  "id": "GHSA-qxx2-7h4c-83f4",
  "modified": "2026-02-03T23:47:29Z",
  "published": "2026-02-03T23:47:29Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/security/advisories/GHSA-qxx2-7h4c-83f4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/melange/commit/6e243d0d46699f837d7c392397a694d2bcc7612b"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/chainguard-dev/melange"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "melange QEMU runner could write files outside workspace directory"
}