CVE-2026-28492Public exploitNetwork attack vector

File disclosure via parent-directory filesystem rebasing

Published Mar 5, 2026 · Updated Mar 5, 2026

Path traversal in File Browser before 2.61.0 allows remote attackers with a directory share link to read files in sibling directories. The withHashFile middleware in http/public.go passes filepath.Dir(link.Path) as the BasePathFs root, rebasing a shared directory to its parent. Exposure requires an existing directory share link; unprotected links need no authentication, while password-protected shares require the share password.

CVSS severity7.1
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in File Browser before 2.61.0 allows remote attackers with a directory share link to read files in sibling directories. The withHashFile middleware in http/public.go passes filepath.Dir(link.Path) as the BasePathFs root, rebasing a shared directory to its parent. Exposure requires an existing directory share link; unprotected links need no authentication, while password-protected shares require the share password.

The record

CVE
CVE-2026-28492
Published
Mar 5, 2026
Updated
Mar 5, 2026
Vendor
File Browser Contributors
Product
File Browser
Classifications
CWE-200, T1083, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 5, 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=< 2.61.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

File Browser Contributors · File Browserversion=< 2.61.0

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
6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/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 exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1083File and Directory Discovery
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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