{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.15"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7d7cf42db76d9cfa5a4bc42fff14943877ac570b"
            },
            {
              "fixed": "a4d08fd2ade1cfd0ef2c29dc221e649345f23580"
            }
          ],
          "repo": "https://github.com/jupyterhub/systemdspawner",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "jupyterhub-systemdspawner enables JupyterHub to spawn single-user notebook servers using systemd. In jupyterhub-systemdspawner before version 0.15 user API tokens issued to single-user servers are specified in the environment of systemd units. These tokens are incorrectly accessible to all users. In particular, the-littlest-jupyterhub is affected, which uses systemdspawner by default. This is patched in jupyterhub-systemdspawner v0.15",
  "id": "CVE-2020-26261",
  "modified": "2026-03-13T21:50:39.847040379Z",
  "published": "2020-12-09T17:15:30.603Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/jupyterhub/systemdspawner/blob/master/CHANGELOG.md#v015"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/jupyterhub/systemdspawner/security/advisories/GHSA-cg54-gpgr-4rm6"
    },
    {
      "type": "FIX",
      "url": "https://github.com/jupyterhub/systemdspawner/commit/a4d08fd2ade1cfd0ef2c29dc221e649345f23580"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/jupyterhub-systemdspawner/"
    }
  ],
  "related": [
    "GHSA-cg54-gpgr-4rm6"
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}