Security advisory

{
  "id": "d9027d915934a88ffe72b5d77b231a2a3235a454c4e99a11f9243baee5141b8d",
  "url": "https://osv.dev/vulnerability/CVE-2020-15110",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-15110",
    "summary": "In jupyterhub-kubespawner before 0.12, certain usernames will be able to craft particular server names which will grant them access to the default server of other users who have matching usernames. This has been fixed in 0.12.",
    "evidence": "osv:CVE-2020-15110",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-15110",
      "aliases": [
        "CVE-2020-15110",
        "GHSA-v7m9-9497-p9gr",
        "PYSEC-2020-51"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jupyterhub/kubespawner",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7aed1e1050e3b02798964af9dfb56e29571fa63d"
                },
                {
                  "fixed": "3dfe870a7f5e98e2e398b01996ca6b8eff4bb1d0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:jupyterhub:kubespawner:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.12"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3dfe870a7f5e98e2e398b01996ca6b8eff4bb1d0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.11.1",
            "0.11.0",
            "0.10.1",
            "0.10.0",
            "0.9.0",
            "v0.9.0b2",
            "v0.9.0b1",
            "v0.8.1",
            "v0.8.0",
            "v0.7.1",
            "v0.6.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15110.json"
          }
        }
      ],
      "modified": "2026-10-20T10:51:53.204645286Z",
      "provider": "osv",
      "references": [
        "https://github.com/jupyterhub/kubespawner/commit/3dfe870a7f5e98e2e398b01996ca6b8eff4bb1d0",
        "https://github.com/jupyterhub/kubespawner/security/advisories/GHSA-v7m9-9497-p9gr"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-15110",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383087,
  "published_at": "2020-07-17T21:15:12.857+00:00"
}