Dask Loader core.py from_npy_stack deserialization

{
  "id": "1c644fcb2143af48158073cce29fe5c6c998d6c261834660457e4ed50bb5d40b",
  "url": "https://osv.dev/vulnerability/CVE-2026-95897",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Dask Loader core.py from_npy_stack deserialization",
    "summary": "A security vulnerability has been detected in Dask up to 2026.8.0. This affects the function from_npy_stack of the file dask/array/core.py of the component Loader. Such manipulation leads to deserialization. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.",
    "evidence": "osv:CVE-2026-95897",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-95897",
      "aliases": [
        "CVE-2026-95897"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/dask/dask",
              "type": "GIT",
              "events": [
                {
                  "introduced": "804844ed3a5ef0929a125a70296169668bcf5924"
                },
                {
                  "last_affected": "9dc535daa30d7d36d63d4a003b54342fbc7032db"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2026.1"
                      },
                      {
                        "last_affected": "2026.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2026.3"
                      },
                      {
                        "last_affected": "2026.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2026.6"
                      },
                      {
                        "last_affected": "2026.6"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2026.7"
                      },
                      {
                        "last_affected": "2026.7"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2026.8.0"
                      },
                      {
                        "last_affected": "2026.8.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2026.8.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2026.1",
            "2026.3",
            "2026.6",
            "2026.7",
            "2026.8.0",
            "2026.7.0",
            "2026.1.2",
            "2026.6.0",
            "2026.3.0",
            "2026.1.1",
            "2026.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-95897.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.721998829Z",
      "provider": "osv",
      "references": [
        "https://github.com/dask/dask/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/95xxx/CVE-2026-95897.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-95897",
        "https://vuldb.com/cve/CVE-2026-95897",
        "https://vuldb.com/submit/953281",
        "https://vuldb.com/vuln/408543",
        "https://github.com/dask/dask/issues/12578",
        "https://vuldb.com/vuln/408543/cti"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20",
          "CWE-502"
        ],
        "cna_assigner": "VulDB",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2026.0"
                  },
                  {
                    "last_affected": "2026.0"
                  },
                  {
                    "introduced": "2026.2"
                  },
                  {
                    "last_affected": "2026.2"
                  },
                  {
                    "introduced": "2026.4"
                  },
                  {
                    "last_affected": "2026.4"
                  },
                  {
                    "introduced": "2026.5"
                  },
                  {
                    "last_affected": "2026.5"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandaloneSingleVersion"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/95xxx/CVE-2026-95897.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-95897",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493412,
  "published_at": "2026-09-23T00:30:14.623+00:00"
}