CVE-2026-45553Network attack vector

Local file disclosure via unsafe Docutils directives

Published Jun 2, 2026 · Updated Jun 2, 2026

Information disclosure in Zauberzeug NiceGUI before 3.12.0 allows remote attackers to read server-local files via crafted reStructuredText. The prepare_content() function passes content to Docutils without disabling file insertion or raw directives, so include, csv-table, and raw directives embed process-readable files in returned HTML. Exposure requires an application to pass attacker-controlled content to ui.restructured_text(); applications using only trusted static strings are unaffected.

CVSS severity7.5
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Zauberzeug NiceGUI before 3.12.0 allows remote attackers to read server-local files via crafted reStructuredText. The prepare_content() function passes content to Docutils without disabling file insertion or raw directives, so include, csv-table, and raw directives embed process-readable files in returned HTML. Exposure requires an application to pass attacker-controlled content to ui.restructured_text(); applications using only trusted static strings are unaffected.

The record

CVE
CVE-2026-45553
Published
Jun 2, 2026
Updated
Jun 2, 2026
Vendor
Zauberzeug
Product
NiceGUI
Classifications
CWE-200, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.12.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zauberzeug · NiceGUIversion=< 3.12.0

Published CVSS scores

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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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