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Vulnerability Database · PyPI · nicegui · Version

nicegui 2.21.0

2.21.0 is affected by 26 vulnerabilities.

The vulnerabilities that cover this exact version are listed below with the fixed version to move to. The upgrade Vulert recommends: 3.18.0.

Critical 0 High 9 Medium 17 Low 0 Unrated 0

All nicegui versions & vulnerabilities → Source repository Search the database for this package →
Released 08 Jul 2025 Licence MIT Also known from other sources 26 Newer releases 300 Database updated 23/Oct/2026

Release and licence data published by PyPI. Licence information is not legal advice.

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01 Vulnerabilities affecting this version

nicegui 2.21.0 vulnerabilities

26 vulnerabilities cover nicegui 2.21.0. Scroll the table for all of them, or open the full list in the database.

Vulnerability Severity Fixed version Disclosed
CVE-2026-45553: NiceGUI Local File Disclosure via Docutils File Insertion 7.5 high 3.12.0 13 Jul 2026
CVE-2025-66645: NiceGUI Path Traversal Vulnerability Allows Arbitrary File Read 7.5 high 3.4.0 07 Jul 2026
CVE-2026-45553: NiceGUI Local File Disclosure via Docutils File Insertion 7.5 high 3.12.0 18 May 2026
CVE-2026-39844: NiceGUI Arbitrary File Write Vulnerability on Windows 7.5 high 3.10.0 08 Apr 2026
CVE-2026-33332: NiceGUI Memory Consumption Vulnerability in Media File Handling 7.5 high 3.9.0 24 Mar 2026
CVE-2026-25732: NiceGUI Path Traversal Vulnerability in FileUpload.name Property 7.5 high 3.7.0 06 Feb 2026
CVE-2026-25732: NiceGUI Path Traversal Vulnerability via Unsanitized File Upload 7.5 high 3.7.0 05 Feb 2026
CVE-2025-66645: NiceGUI Path Traversal Vulnerability Allows Arbitrary File Read 7.5 high 3.4.0 09 Dec 2025
CVE-2026-21871: NiceGUI XSS Vulnerability via Unescaped URL in History API Methods 6.1 medium 3.5.0 07 Jul 2026
CVE-2025-66469: NiceGUI Reflected XSS via Style Injection in Dynamic Theming 6.1 medium 3.4.0 07 Jul 2026
CVE-2025-66470: NiceGUI Stored/Reflected XSS Vulnerability in ui.interactive_image Component 6.1 medium 3.4.0 07 Jul 2026
CVE-2025-53354: NiceGUI Reflected XSS Vulnerability 6.1 medium 3.0.0 07 Jul 2026
CVE-2026-27156: NiceGUI XSS Vulnerability via Code Injection in Client-Side Element Functions 6.1 high 3.8.0 24 Feb 2026
CVE-2026-27156: NiceGUI Arbitrary JavaScript Execution Vulnerability 6.1 medium 3.8.0 24 Feb 2026
CVE-2026-25516: NiceGUI XSS Vulnerability in ui.markdown() Component 6.1 medium 3.7.0 06 Feb 2026
CVE-2026-25516: NiceGUI XSS Vulnerability in ui.markdown() Allows Arbitrary JavaScript Execution 6.1 medium 3.7.0 05 Feb 2026
XSS Vulnerability in NiceGUI: Unescaped URL Handling in History Navigation 6.1 medium 3.5.0 08 Jan 2026
CVE-2025-66470: NiceGUI Stored/Reflected XSS Vulnerability in ui.interactive_image Component 6.1 medium 3.4.0 08 Dec 2025
CVE-2025-66469: NiceGUI Reflected XSS via Style Injection in Dynamic CSS Functions 6.1 medium 3.4.0 08 Dec 2025
CVE-2025-53354: NiceGUI Reflected XSS Vulnerability in User Input Rendering 6.1 medium 3.0.0 03 Oct 2025
CVE-2026-39844: NiceGUI Path Traversal Vulnerability via Filename Sanitization Bypass 5.9 medium 3.10.0 08 Apr 2026
CVE-2026-45554: NiceGUI Unauthenticated Log-Volume Denial of Service Vulnerability 5.3 medium 3.12.0 13 Jul 2026
CVE-2026-21874: NiceGUI Redis Connection Leak Leading to Service Degradation 5.3 medium 3.5.0 07 Jul 2026
CVE-2026-45554: NiceGUI Unauthenticated Log-Volume Denial of Service Vulnerability 5.3 medium 3.12.0 18 May 2026
CVE-2026-33332: NiceGUI Media Routes Vulnerability Leading to Memory Exhaustion 5.3 medium 3.9.0 19 Mar 2026
CVE-2026-21874: NiceGUI Redis Connection Leak Leading to Service Degradation 5.3 medium 3.5.0 08 Jan 2026

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Questions

About nicegui 2.21.0

Is nicegui 2.21.0 vulnerable?

Yes. 26 vulnerabilities in the Vulert database cover nicegui 2.21.0: 0 critical, 9 high, 17 medium and 0 low. The upgrade Vulert recommends is 3.18.0, and each entry above names the fixed version to move to.

Which version of nicegui should I use instead of 2.21.0?

3.18.0 is the version Vulert recommends for this release line. The version table on the package page lists every release with the vulnerabilities recorded against it.

Is 2.21.0 the latest release of nicegui?

No. 2.21.0 was published 08 Jul 2025, and newer releases exist. Newer is not automatically safer — the version table on the package page shows what each release carries.

How do I monitor nicegui for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the nicegui version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.