Is CVE-2026-45553 actively exploited?

No active exploitation of CVE-2026-45553 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-45553 be exploited remotely?

Yes. CVE-2026-45553 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-45553?

CVE-2026-45553 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-45553

HIGH

CVE-2026-45553

CWE-200Published: June 2, 2026· Updated: Jun 2, 2026

7.5

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:9.3th

Official Description

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 content to ui.restructured_text(), an attacker can use standard Docutils directives (include, csv-table with :file:, raw with :file:) to read local files readable by the NiceGUI server process. Applications that only pass trusted static strings to ui.restructured_text() are not affected. This issue has been patched in version 3.12.0.

NVD Source

Technical Analysis

CVE-2026-45553 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.