CVE-2026-46410Network attack vector

Unauthenticated source-path disclosure via user defaults

Published Jul 20, 2026 · Updated Jul 20, 2026

Information disclosure in FileBrowser Quantum before 1.3.2-stable and 1.4.1-beta allows remote attackers to read source and path data. ApplyUserDefaults continued into the account-permissions block for the anonymous share user, copying configured defaults that exposed source metadata. An unauthenticated request through a public share is sufficient; the published consequence is limited to sensitive source and path information.

CVSS severity8.7
High
EPSS probability0.45%
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 FileBrowser Quantum before 1.3.2-stable and 1.4.1-beta allows remote attackers to read source and path data. ApplyUserDefaults continued into the account-permissions block for the anonymous share user, copying configured defaults that exposed source metadata. An unauthenticated request through a public share is sufficient; the published consequence is limited to sensitive source and path information.

The record

CVE
CVE-2026-46410
Published
Jul 20, 2026
Updated
Jul 20, 2026
Vendor
Graham Steffaniak
Product
FileBrowser Quantum
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 20, 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=< 1.3.2-stable
  2. Affected versionversion=< 1.4.1-beta

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Graham Steffaniak · FileBrowser Quantumversion=< 1.3.2-stable; version=< 1.4.1-beta

Published CVSS scores

8.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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

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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