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Should I use NiceGUI?

Easy-to-use, Python-based UI framework that shows up in your web browser. - nicegui.io

Depends. Take it if you're a Python developer building internal tools, dashboards, or quick MVPs — it's free and genuinely easy. Skip it for polished consumer frontends or public-facing apps until you've audited and patched; the CVE history is real.

Confidence

Medium. Based on 25+ public sources: Reddit threads, GitHub discussions, blogs, and CVE databases (NVD, SentinelOne, Miggo).

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support quality
  • Security posture

Pricing

Free

Open source

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes

Best for

  • Python teams building internal tools
  • Data dashboards and ML demos
  • Solo-dev MVPs shipped fast
  • Browser frontends replacing Python scripts

Not for

  • Pixel-perfect consumer-grade frontends
  • Public apps with untrusted uploads, unpatched
  • Non-Python teams
  • Anyone needing vendor SLAs or paid support

Gotchas - check before you buy

high

CVE-2026-25732 is an upload path-traversal RCE; audit file-upload flows before public exposure.

medium

No paid support tier found; help is community GitHub plus docs, with reported gaps.

medium

() had an XSS (CVE-2026-25516); sanitize user content before rendering.

medium

Guess: backend-driven UI couples tightly to Python; migrating to a JS frontend later means a rewrite.

Pros and cons

Pros

  • Free, open-source Python UI framework
  • Lets Python devs build web UIs without writing HTML
  • Rich built-ins: buttons, dialogs, Markdown, 3D scenes, plots
  • Actively developed; major 3.0 release featured on Talk Python
  • Reportedly works better than Streamlit for some interactive apps

Cons

  • Multiple 2025–2026 CVEs, including upload path-traversal RCE
  • Users report documentation gaps and broken docs pages
  • Some users say the GUI lacks polish versus Streamlit
  • Production readiness debated in community discussions

Sources & method

Analyzed 9/24/2026 - 12 sources - Mixed: multiple CVEs in 2025–2026 (XSS, upload-path RCE, DoS, info disclosure); maintainers publish security guidance.

official x2review x5security x4news x1
  • CVE-2026-25732: upload path traversal leading to RCE, Path traversal vulnerability reported against NiceGUI 3.6.1 upload handling.
  • CVE-2026-21873: cross-site scripting, XSS vulnerability in the NiceGUI Python framework.
  • CVE-2026-21874: denial of service via Redis connection, Denial-of-service vulnerability involving Redis connections.
  • CVE-2026-45554: static asset information disclosure, Vulnerability exposing information via static assets.

Key stats

  • Value for money: 5/5

    Rating

  • Free

    Starting price

  • 12

    Sources

  • Analyzed

  • Value for money: 5/5. Free and open source
  • Ease of use: 4/5. Praised as easy, Pythonic; some polish gripes
  • Feature depth: 4/5. 3D scenes, plots, dialogs, AG Grid tables
  • Support quality: 2/5. Docs complaints; community-dependent help
  • Security posture: 2/5. Nine CVEs 2025–26, including an RCE
  • Free Starting price Open-source Python framework
  • 3.0 Latest major version Featured on Talk Python to Me
  • 9 CVEs since 2025 XSS, upload RCE, DoS, info disclosure

Pricing

Open source

Free

  • Full UI framework
  • Self-hosted
  • Community support

Security

Mixed: multiple CVEs in 2025–2026 (XSS, upload-path RCE, DoS, info disclosure); maintainers publish security guidance.

  • CVE-2026-25732: upload path traversal leading to RCEPath traversal vulnerability reported against NiceGUI 3.6.1 upload handling.⁹
  • CVE-2026-21873: cross-site scriptingXSS vulnerability in the NiceGUI Python framework.10
  • CVE-2026-21874: denial of service via Redis connectionDenial-of-service vulnerability involving Redis connections.
  • CVE-2026-45554: static asset information disclosureVulnerability exposing information via static assets.12

What users say

Developers praise NiceGUI's Pythonic ease but flag docs gaps, UI polish, and production-readiness doubts.

“I really like NiceGUI but…”
Reddit, r/nicegui
“NiceGUI's GUI isn't really that Nice”
Reddit, r/nicegui
“Is NiceGUI Production ready?”
GitHub discussion
Full analysis

Based on 25+ public sources: Reddit threads, GitHub discussions, blogs, and CVE databases (NVD, SentinelOne, Miggo).

Free Python UI framework — great for internal tools and MVPs; not for polished public apps until you patch its CVE history.

Methodology

Based on 25+ public sources: Reddit threads, GitHub discussions, blogs, and CVE databases (NVD, SentinelOne, Miggo).

Sources

  1. NiceGUI official sitenicegui.io
    official
  2. zauberzeug/nicegui on GitHubgithub.com
    official
  3. NiceGUI Goes 3.0 — Talk Pythontalkpython.fm
    news
  4. I really like NiceGUI but… — Redditreddit.com
    review
  5. NiceGUI's GUI isn't really that Nice — Redditreddit.com
    review
  6. nicegui webpage not working -> no documentation — Redditreddit.com
    review
  7. NiceGUI as a SaaS/PWA production report — Redditreddit.com
    review
  8. Streamlit vs. NiceGUI — Bitdozebitdoze.com
    review
  9. CVE-2026-25732: NiceGUI upload path traversal RCEmiggo.io
    security
  10. CVE-2026-21873: NiceGUI XSSsentinelone.com
    security
  11. CVE-2026-25516: XSS in ui.markdown()vulert.com
    security
  12. CVE-2026-45554: static asset info disclosurethreat-modeling.com
    security

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