CVE-2026-54088Public exploitNetwork attack vector

Pre-auth command execution via unsanitized credential expansion

Published Jun 25, 2026 · Updated Jun 25, 2026

OS command injection in File Browser before 2.63.6 allows remote attackers to execute commands through crafted login credentials. HookAuth.RunCommand in auth/hook.go expands attacker-controlled username and password values into the configured shell command with os.Expand and no sanitization. Exposure requires an administrator-configured Hook Authentication command; injected commands run with the File Browser process privileges.

CVSS severity9.3
Critical
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in File Browser before 2.63.6 allows remote attackers to execute commands through crafted login credentials. HookAuth.RunCommand in auth/hook.go expands attacker-controlled username and password values into the configured shell command with os.Expand and no sanitization. Exposure requires an administrator-configured Hook Authentication command; injected commands run with the File Browser process privileges.

The record

CVE
CVE-2026-54088
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
File Browser Contributors
Product
File Browser
Classifications
CWE-88, CWE-78, CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

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=< 2.63.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

File Browser Contributors · File Browserversion=< 2.63.6

Published CVSS scores

9.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-306Missing Authentication for Critical Function
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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