What is CVE-2026-45553?

CVE-2026-45553 is a high-severity vulnerability in Zauberzeug Nicegui, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-06-02.

How severe is CVE-2026-45553?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in Zauberzeug Nicegui

CVE-2026-45553

NiceGUI is a Python-based UI framework. Prior to version 3.12.0, ui.restructured_text() renders reStructuredText server-side with Docutils without disabling file insertion directives. When a NiceGUI application passes attacker-controlled c…

Vulnerability class: Information Disclosure

EPSS: 0.000 (9.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Zauberzeug Nicegui — versions < 3.12.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-45553?: CVE-2026-45553 is a high-severity vulnerability in Zauberzeug Nicegui, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-06-02.
How severe is CVE-2026-45553?: High severity. CVSS v3 base score is 7.5 out of 10.