CVE-2026-34528Public exploitNetwork attack vector

Unauthenticated command execution via inherited signup permissions

Published Apr 1, 2026 · Updated Apr 1, 2026

Improper privilege management in File Browser before 2.62.2 allows remote attackers to execute server commands after self-registration. The signupHandler copies the complete default permission template, but clears only Admin and leaves Execute and the Commands allowlist attached to the new account. Exploitation requires enabled signup and server-side execution plus an executable default template; commands run with the File Browser process privileges.

CVSS severity8.1
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper privilege management in File Browser before 2.62.2 allows remote attackers to execute server commands after self-registration. The signupHandler copies the complete default permission template, but clears only Admin and leaves Execute and the Commands allowlist attached to the new account. Exploitation requires enabled signup and server-side execution plus an executable default template; commands run with the File Browser process privileges.

The record

CVE
CVE-2026-34528
Published
Apr 1, 2026
Updated
Apr 1, 2026
Vendor
File Browser Contributors
Product
File Browser
Classifications
CWE-269, T1136, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 1, 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=< 2.62.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

File Browser Contributors · File Browserversion=< 2.62.2

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1136Create Account
T1059Command and Scripting Interpreter

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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