id: PYSEC-2026-2233
published: "2026-03-24T20:16:28.743Z"
modified: "2026-07-13T05:50:14.966367Z"
aliases:
- CVE-2026-33332
- GHSA-w5g8-5849-vj76
details: NiceGUI is a Python-based UI framework. Prior to version 3.9.0, NiceGUI's app.add_media_file() and app.add_media_files() media routes accept a user-controlled query parameter that influences how files are read during streaming. The parameter is passed to the range-response implementation without validation, allowing an attacker to bypass chunked streaming and force the server to load entire files into memory at once. With large media files and concurrent requests, this can lead to excessive memory consumption, degraded performance, or denial of service. This issue has been patched in version 3.9.0.
affected:
- package:
    name: nicegui
    ecosystem: PyPI
    purl: pkg:pypi/nicegui
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - fixed: 3.9.0
  versions:
  - 0.1.0
  - 0.1.4
  - 0.1.6
  - 0.2.0
  - 0.2.1
  - 0.2.10
  - 0.2.11
  - 0.2.12
  - 0.2.13
  - 0.2.14
  - 0.2.15
  - 0.2.2
  - 0.2.3
  - 0.2.4
  - 0.2.9
  - 0.3.0
  - 0.3.1
  - 0.3.2
  - 0.3.3
  - 0.3.4
  - 0.3.5
  - 0.3.6
  - 0.3.7
  - 0.3.8
  - 0.3.9
  - 0.4.0
  - 0.4.1
  - 0.4.10
  - 0.4.11
  - 0.4.12
  - 0.4.13
  - 0.4.14
  - 0.4.15
  - 0.4.2
  - 0.4.3
  - 0.4.4
  - 0.4.5
  - 0.4.6
  - 0.4.7
  - 0.4.8
  - 0.4.9
  - 0.5.0
  - 0.5.1
  - 0.5.10
  - 0.5.11
  - 0.5.12
  - 0.5.2
  - 0.5.3
  - 0.5.4
  - 0.5.5
  - 0.5.6
  - 0.5.7
  - 0.5.8
  - 0.5.9
  - 0.6.0
  - 0.6.1
  - 0.6.10
  - 0.6.11
  - 0.6.12
  - 0.6.13
  - 0.6.2
  - 0.6.3
  - 0.6.4
  - 0.6.5
  - 0.6.6
  - 0.6.7
  - 0.6.8
  - 0.6.9
  - 0.7.0
  - 0.7.1
  - 0.7.10
  - 0.7.11
  - 0.7.12
  - 0.7.13
  - 0.7.14
  - 0.7.15
  - 0.7.16
  - 0.7.17
  - 0.7.18
  - 0.7.19
  - 0.7.2
  - 0.7.21
  - 0.7.22
  - 0.7.23
  - 0.7.24
  - 0.7.25
  - 0.7.26
  - 0.7.27
  - 0.7.28
  - 0.7.29
  - 0.7.3
  - 0.7.30
  - 0.7.4
  - 0.7.6
  - 0.7.7
  - 0.7.8
  - 0.7.9
  - 0.8.0
  - 0.8.1
  - 0.8.10
  - 0.8.11
  - 0.8.12
  - 0.8.13
  - 0.8.14
  - 0.8.15
  - 0.8.16
  - 0.8.2
  - 0.8.3
  - 0.8.4
  - 0.8.5
  - 0.8.6
  - 0.8.7
  - 0.8.8
  - 0.8.9
  - 0.9.0
  - 0.9.1
  - 0.9.10
  - 0.9.11
  - 0.9.12
  - 0.9.13
  - 0.9.14
  - 0.9.15
  - 0.9.16
  - 0.9.17
  - 0.9.18
  - 0.9.19
  - 0.9.2
  - 0.9.20
  - 0.9.21
  - 0.9.22
  - 0.9.23
  - 0.9.24
  - 0.9.25
  - 0.9.26
  - 0.9.27
  - 0.9.28
  - 0.9.3
  - 0.9.4
  - 0.9.5
  - 0.9.6
  - 0.9.7
  - 0.9.8
  - 0.9.9
  - 1.0.1
  - 1.0.10
  - 1.0.2
  - 1.0.3
  - 1.0.4
  - 1.0.5
  - 1.0.6
  - 1.0.7
  - 1.0.8
  - 1.0.9
  - 1.1.0
  - 1.1.1
  - 1.1.10
  - 1.1.11
  - 1.1.2
  - 1.1.3
  - 1.1.4
  - 1.1.5
  - 1.1.6
  - 1.1.7
  - 1.1.8
  - 1.1.9
  - 1.2.0
  - 1.2.1
  - 1.2.10
  - 1.2.11
  - 1.2.12
  - 1.2.13
  - 1.2.14
  - 1.2.15
  - 1.2.16
  - 1.2.17
  - 1.2.18
  - 1.2.2
  - 1.2.20
  - 1.2.21
  - 1.2.22
  - 1.2.23
  - 1.2.24
  - 1.2.3
  - 1.2.4
  - 1.2.5
  - 1.2.6
  - 1.2.7
  - 1.2.8
  - 1.2.9
  - 1.3.0
  - 1.3.1
  - 1.3.10
  - 1.3.11
  - 1.3.12
  - 1.3.13
  - 1.3.14
  - 1.3.15
  - 1.3.16
  - 1.3.17
  - 1.3.18
  - 1.3.2
  - 1.3.3
  - 1.3.4
  - 1.3.5
  - 1.3.6
  - 1.3.7
  - 1.3.8
  - 1.3.9
  - 1.4.0
  - 1.4.1
  - 1.4.10
  - 1.4.11
  - 1.4.12
  - 1.4.13
  - 1.4.14
  - 1.4.15
  - 1.4.16
  - 1.4.17
  - 1.4.18
  - 1.4.19
  - 1.4.2
  - 1.4.20
  - 1.4.21
  - 1.4.22
  - 1.4.23
  - 1.4.24
  - 1.4.25
  - 1.4.26
  - 1.4.27
  - 1.4.28
  - 1.4.29
  - 1.4.3
  - 1.4.30
  - 1.4.31
  - 1.4.33
  - 1.4.34
  - 1.4.35
  - 1.4.36
  - 1.4.37
  - 1.4.4
  - 1.4.5
  - 1.4.6
  - 1.4.7
  - 1.4.8
  - 1.4.9
  - 2.0.0
  - 2.0.1
  - 2.1.0
  - 2.10.0
  - 2.10.1
  - 2.11.0
  - 2.11.1
  - 2.12.0
  - 2.12.1
  - 2.13.0
  - 2.14.0
  - 2.14.1
  - 2.15.0
  - 2.16.0
  - 2.16.1
  - 2.17.0
  - 2.18.0
  - 2.19.0
  - 2.2.0
  - 2.20.0
  - 2.21.0
  - 2.21.1
  - 2.22.0
  - 2.22.1
  - 2.22.2
  - 2.23.0
  - 2.23.1
  - 2.23.2
  - 2.23.3
  - 2.24.0
  - 2.24.1
  - 2.24.2
  - 2.3.0
  - 2.4.0
  - 2.5.0
  - 2.7.0
  - 2.8.0
  - 2.8.1
  - 2.9.0
  - 2.9.1
  - 3.0.0
  - 3.0.0rc1
  - 3.0.1
  - 3.0.2
  - 3.0.3
  - 3.0.4
  - 3.1.0
  - 3.2.0
  - 3.3.0
  - 3.3.1
  - 3.4.0
  - 3.4.1
  - 3.5.0
  - 3.6.0
  - 3.6.1
  - 3.7.0
  - 3.7.1
  - 3.8.0
  ecosystem_specific: {}
references:
- type: ADVISORY
  url: https://github.com/zauberzeug/nicegui/releases/tag/v3.9.0
- type: ADVISORY
  url: https://github.com/zauberzeug/nicegui/security/advisories/GHSA-w5g8-5849-vj76
- type: FIX
  url: https://github.com/zauberzeug/nicegui/commit/9026962b8c4f3f225c98b2fbc35aa6b60cb3495b
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H