CVE-2026-45553

Description

NiceGUI: Local file disclosure via Docutils file insertion in ui.restructured_text()

Overview

State

—

Assigner (CNA)

—

CVSS severity

high

CVSS score

7.5 / 10

CVSS vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Effective score

7.5 / 10 HIGH source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-45553

Linked Threat

CVE-2026-45553 — CVE-2026-45553

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-33963

Assigner

GitHub_M

Published

Jun 2, 2026, 3:34:39 PM

Updated

Jun 3, 2026, 1:49:28 PM

EUVD base score (CVSS 3.1)

7.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EUVD-reported EPSS

0.2600

Vendors

zauberzeug

Products

nicegui (< 3.12.0)

Aliases

GHSA-jfrm-rx66-g536

ENISA 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.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (5)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://www.first.org/epss/ tenable:www.first.org
• https://github.com/zauberzeug/nicegui/releases/tag/v3.12.0 tenable:github.com
• https://github.com/zauberzeug/nicegui/security/advisories/GHSA-jfrm-rx66-g536 tenable:github.com
• https://nvd.nist.gov/vuln/detail/CVE-2026-45553 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-45553 tenable:www.cve.org

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Microsoft and Adobe Patch Tuesday, April 2026 Security Update Review
  web:blog.qualys.com

  With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.

  2026-05-26 02:57 UTC
• Oracle Database Patch Maintenance
  web:docs.oracle.com

  Discover how reactive patch maintenance differs from proactive patch maintenance.

  2026-05-26 02:57 UTC
• CVE-2026-45553 | Security Details | Sonatype Guide
  web:guide.sonatype.com

  Technical security analysis for CVE-2026-45553 . CVSS 7.5 severity. View CVSS vectors, CWE classifications, and exploit maturity ratings.

  2026-05-26 02:57 UTC
• Patching : Find the Required Patches for Oracle Products
  web:oracle-base.com

  The OPatch utility doesn't let you re-apply a patch already present, so it's quite easy to simplify the process by having a very similar process each quarter. Once I've got all the patches, I write a patching script for each product. For the database this includes OPatch and the latest database patches.

  2026-05-26 02:57 UTC
• Security Update Guide - Microsoft
  web:portal.msrc.microsoft.com

  The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

  2026-05-26 02:57 UTC
• Microsoft Issues Second Biggest Patch Tuesday Ever in April
  web:redmondmag.com

  Microsoft April 2026 Patch Tuesday fixed 163 CVEs , marking its second-largest security update. Three zero-day vulnerabilities impacted SharePoint, Chromium-based Edge workflows and Microsoft Defender.

  2026-05-26 02:57 UTC
• April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
  web:www.crowdstrike.com

  Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

  2026-05-26 02:57 UTC
• CVE: Common Vulnerabilities and Exposures
  web:www.cve.org

  At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

  2026-05-26 02:57 UTC
• Is Vulnerability Mitigation Just Patching? Or Patching and Beyond ...
  web:www.secpod.com

  Mitigation , on the other hand, is the process of eradicating risk. It includes patching and other means of risk remediation . Examples could be workarounds, security controls, isolation, or even physical replacement of assets. So, have you been patching or mitigating? Why is Patching Not Enough?

  2026-05-26 02:57 UTC
• Oracle April 2026 Critical Patch Update 241 CVEs | Tenable®
  web:www.tenable.com

  Oracle addresses 241 CVEs in its April Critical Patch Update, the second quarterly update of 2026 with 481 patches, including 34 critical updates.

  2026-05-26 02:57 UTC

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