CVE-2026-95897

Description

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.

Overview

State: PUBLISHED
Assigner (CNA): VulDB
CVSS severity: MEDIUM
CVSS score: 5.1 / 10
CVSS vector: 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
Effective score: 5.1 / 10 MEDIUM source: CNA overview
CWE(s): CWE-502, CWE-20
Reserved: 2026-09-22
Published: 2026-09-23 00:30 UTC
Last updated: 2026-09-23 00:30 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/95xxx/CVE-2026-95897.json

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 01:16:31 UTC
NVD last modified: 2026-09-23 01:16:31 UTC
NVD CVSS v3.1: 5.5 / 10 MEDIUM source: cna@vuldb.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Exploitability subscore: 2.1 / 10
Impact subscore: 3.4 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-84993
Assigner: VulDB
Published: Sep 23, 2026, 12:30:14 AM
Updated: Sep 23, 2026, 12:30:14 AM
EUVD base score (CVSS 4.0): 5.1 / 10
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
EUVD-reported EPSS: 0.0000
Vendors: n/a
Products: dask (2026.1)

dask (2026.8.0)

dask (2026.4)

dask (2026.6)

dask (2026.0)

dask (2026.2)

dask (2026.5)

dask (2026.3)

dask (2026.7)
Aliases: GHSA-7jm5-7xjw-qq97

ENISA description: 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.

EUVD references (6)

Affected products (1)

Vendor	Product	Versions	Platforms
n/a	Dask	`2026.0` (affected), `2026.1` (affected), `2026.2` (affected), `2026.3` (affected), `2026.4` (affected), `2026.5` (affected), `2026.6` (affected), `2026.7` (affected), `2026.8.0` (affected)	—

Vendor references (6)

References embedded in the original CVE record by the assigning CNA.

VDB-408543 | Dask Loader core.py from_npy_stack deserialization vdb-entrytechnical-description
VDB-408543 | CTI Indicators (IOB, IOC, IOA) signaturepermissions-required
CVE-2026-95897 | CVE Analysis and Report third-party-advisory
Submit #953281 | dask ≤2026.8.0 rce third-party-advisory
https://github.com/dask/dask/issues/12578 exploitissue-tracking
https://github.com/dask/dask/ product

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (6)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/dask/dask/ cna@vuldb.com
https://github.com/dask/dask/issues/12578 cna@vuldb.com
https://vuldb.com/cve/CVE-2026-95897 cna@vuldb.com
https://vuldb.com/submit/953281 cna@vuldb.com
https://vuldb.com/vuln/408543 cna@vuldb.com
https://vuldb.com/vuln/408543/cti cna@vuldb.com

Remediations (10)

CVE-2026-95897 - Red Hat Customer Portal

web:access.redhat.com

Overall, you have the following options: Upgrade to a supported product version that includes a fix for this vulnerability (recommended). Apply a mitigation (if one exists). Customers with the Technical Account Manager (TAM) RHEL Security Select Add-on can review this CVE directly with their TAM.

2026-09-23 15:40 UTC
August 2026 cumulative update - .NET Framework | Microsoft Learn

web:learn.microsoft.com

This update installs the complete .NET Framework 3.5 product for Windows 11, version 26H1 (build version 28000) and newer. Unlike traditional cumulative updates that patch individual components, this update delivers the full .NET Framework 3.5 product as a standalone installer. It replaces any previously installed version.

2026-09-23 15:40 UTC
Security Advisories and Bulletins | Microsoft Learn

web:learn.microsoft.com

In this library you will find the following security documents that have been released by the Microsoft Security Response Center (MSRC). The MSRC investigates all reports of security vulnerabilities affecting Microsoft products and services, and releases these documents as part of the ongoing effort to help you manage security risks and help keep your systems protected. Please use the ...

2026-09-23 15:40 UTC
Security Update Guide - Microsoft

web:msrc.microsoft.com

The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

2026-09-23 15:40 UTC
Security Update Guide - Microsoft Security Response Center

web:msrc.microsoft.com

Security Update Guide - Microsoft Security Response Center

2026-09-23 15:40 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-23 15:40 UTC
Description of the security update for Office 2016: August 11, 2026 ...

web:support.microsoft.com

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home. (See What version of Office am I using?) How to get and install the update Method 1: Microsoft Update This update is available from Microsoft Update. When you turn on ...

2026-09-23 15:40 UTC
July 18, 2026—Hotpatch KB5121768 (OS Builds 26200.8893 and 26100.8893 ...

web:support.microsoft.com

This out-of-band (OOB) update for Windows 11, version 25H2 and Windows 11, version 24H2 (KB5121768) is cumulative. It includes all improvements from previous security and non-security updates, along with an additional fix . Improvements This OOB update includes the following improvement: [System Performance] This update addresses an issue affecting a limited number of devices with an Intel ...

2026-09-23 15:40 UTC
CVE-2026-95897: n/a Dask: A security vulnerability has been ... - Rapid7

web:www.rapid7.com

CVE-2026-95897 : n/a Dask: A security vulnerability has been detected in Dask up to 2026.8.0. View severity, references, and remediation details from Rapid7.

2026-09-23 15:40 UTC
CVE-2026-95897 | Tenable®

web:www.tenable.com

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.

2026-09-23 15:40 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-95897.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:dask:dask:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "Loader"
          ],
          "product": "Dask",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "2026.0"
            },
            {
              "status": "affected",
              "version": "2026.1"
            },
            {
              "status": "affected",
              "version": "2026.2"
            },
            {
              "status": "affected",
              "version": "2026.3"
            },
            {
              "status": "affected",
              "version": "2026.4"
            },
            {
              "status": "affected",
              "version": "2026.5"
            },
            {
              "status": "affected",
              "version": "2026.6"
            },
            {
              "status": "affected",
              "version": "2026.7"
            },
            {
              "status": "affected",
              "version": "2026.8.0"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "__lbz__ (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "VulDB CNA Team"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 5.1,
            "baseSeverity": "MEDIUM",
            "vectorString": "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",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 6.5,
            "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "Deserialization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-23T00:30:14.623Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-408543 | Dask Loader core.py from_npy_stack deserialization",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/408543"
        },
        {
          "name": "VDB-408543 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/408543/cti"
        },
        {
          "name": "CVE-2026-95897 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-95897"
        },
        {
          "name": "Submit #953281 | dask \u22642026.8.0 rce",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/953281"
        },
        {
          "tags": [
            "exploit",
            "issue-tracking"
          ],
          "url": "https://github.com/dask/dask/issues/12578"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/dask/dask/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-09-22T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-09-22T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-09-22T19:12:19.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Dask Loader core.py from_npy_stack deserialization",
      "x_generator": [
        "VulDB PVTS v202609"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-95897",
    "datePublished": "2026-09-23T00:30:14.623Z",
    "dateReserved": "2026-09-22T17:07:14.182Z",
    "dateUpdated": "2026-09-23T00:30:14.623Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}