CVE-2026-72835Public exploitNetwork attack vector

Access rule bypass via uncanonicalized path comparison

Published Aug 14, 2026 · Updated Aug 14, 2026

Access control bypass in File Browser before 2.63.21 allows remote authenticated users to access administrator-denied files. rules.Rule.Matches compares raw virtual paths literally before data.Check passes them to the host filesystem for resolution. Exploitation requires a case-insensitive filesystem or Windows separator semantics; impact stays within the user's scope but includes permitted reading, modification, deletion, copying, or sharing.

CVSS severity6.8
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access control bypass in File Browser before 2.63.21 allows remote authenticated users to access administrator-denied files. rules.Rule.Matches compares raw virtual paths literally before data.Check passes them to the host filesystem for resolution. Exploitation requires a case-insensitive filesystem or Windows separator semantics; impact stays within the user's scope but includes permitted reading, modification, deletion, copying, or sharing.

The record

CVE
CVE-2026-72835
Published
Aug 14, 2026
Updated
Aug 14, 2026
Vendor
File Browser
Product
File Browser
Classifications
CWE-41, CWE-180, CWE-178, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <2.63.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

File Browser · File Browserversion=0 <2.63.21

Published CVSS scores

6.8File BrowserCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
7.6VulnCheckCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-41Improper Resolution of Path Equivalence
CWE-180Incorrect Behavior Order Validate Before Canonicalize
CWE-178Improper Handling of Case Sensitivity
T1190Exploit Public-Facing Application

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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