CVE-2026-54096Public exploitNetwork attack vector

Future-file disclosure via nonexistent-path public shares

Published Jun 25, 2026 · Updated Jun 25, 2026

Incorrect authorization in File Browser before 2.63.7 allows remote authenticated users to expose future files through public shares. The sharePostHandler function saves a share.Link from the requested path without first verifying that an object exists, while public download handling later resolves that stored path against current filesystem state. Share and download permission is required to plant the record; anyone holding its public hash can read a sensitive file later created at that exact path.

CVSS severity7.1
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in File Browser before 2.63.7 allows remote authenticated users to expose future files through public shares. The sharePostHandler function saves a share.Link from the requested path without first verifying that an object exists, while public download handling later resolves that stored path against current filesystem state. Share and download permission is required to plant the record; anyone holding its public hash can read a sensitive file later created at that exact path.

The record

CVE
CVE-2026-54096
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
File Browser Contributors
Product
File Browser
Classifications
CWE-863, CWE-367, CWE-668, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 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=< 2.63.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

File Browser Contributors · File Browserversion=< 2.63.7

Published CVSS scores

7.1GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-668Exposure of Resource to Wrong Sphere
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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