CVE-2026-45553: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in zauberzeug nicegui
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.
AI Analysis
Technical Summary
The vulnerability in zauberzeug nicegui versions before 3.12.0 involves the server-side rendering of reStructuredText via the ui.restructured_text() function. Because Docutils directives that allow file inclusion (such as include, csv-table with :file:, and raw with :file:) are not disabled, an attacker controlling input to this function can exploit these directives to read arbitrary local files on the server. This exposure of sensitive information is classified as CWE-200. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity. The issue has been addressed by the vendor in nicegui version 3.12.0.
Potential Impact
An attacker able to supply input to the vulnerable ui.restructured_text() function can read local files on the server running nicegui, potentially exposing sensitive information. There is no indication of privilege requirements, user interaction, or impact on integrity or availability. The confidentiality impact is high due to unauthorized information disclosure.
Mitigation Recommendations
This vulnerability is fixed in nicegui version 3.12.0. Users should upgrade to version 3.12.0 or later to remediate this issue. Applications that only pass trusted static strings to ui.restructured_text() are not affected. Patch status is not explicitly stated beyond the version fix; therefore, verify the upgrade and vendor advisory for confirmation.
CVE-2026-45553: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in zauberzeug nicegui
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.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in zauberzeug nicegui versions before 3.12.0 involves the server-side rendering of reStructuredText via the ui.restructured_text() function. Because Docutils directives that allow file inclusion (such as include, csv-table with :file:, and raw with :file:) are not disabled, an attacker controlling input to this function can exploit these directives to read arbitrary local files on the server. This exposure of sensitive information is classified as CWE-200. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity. The issue has been addressed by the vendor in nicegui version 3.12.0.
Potential Impact
An attacker able to supply input to the vulnerable ui.restructured_text() function can read local files on the server running nicegui, potentially exposing sensitive information. There is no indication of privilege requirements, user interaction, or impact on integrity or availability. The confidentiality impact is high due to unauthorized information disclosure.
Mitigation Recommendations
This vulnerability is fixed in nicegui version 3.12.0. Users should upgrade to version 3.12.0 or later to remediate this issue. Applications that only pass trusted static strings to ui.restructured_text() are not affected. Patch status is not explicitly stated beyond the version fix; therefore, verify the upgrade and vendor advisory for confirmation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-12T17:48:47.880Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1efb66e29bf47b50db3525
Added to database: 6/2/2026, 3:48:54 PM
Last enriched: 6/2/2026, 4:03:57 PM
Last updated: 6/3/2026, 4:41:04 AM
Views: 5
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