CVE-2026-72557Network attack vector

Authenticated command execution via unrestricted PHP upload

Published Aug 11, 2026 · Updated Aug 11, 2026

Unrestricted file upload in Cockpit CMS 2.6.0 allows remote authenticated users to execute OS commands through an uploaded PHP script. The asset upload endpoint accepts any extension because allowed_uploads defaults to a wildcard, then stores the uploaded file under a web-accessible path. Any authenticated account can place a PHP webshell that the server processes, granting command execution with the web service's OS privileges.

CVSS severity8.8
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Cockpit CMS 2.6.0 allows remote authenticated users to execute OS commands through an uploaded PHP script. The asset upload endpoint accepts any extension because allowed_uploads defaults to a wildcard, then stores the uploaded file under a web-accessible path. Any authenticated account can place a PHP webshell that the server processes, granting command execution with the web service's OS privileges.

The record

CVE
CVE-2026-72557
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Cockpit HQ
Product
Cockpit CMS
Classifications
CWE-434, T1190, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 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=0 <=2.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cockpit HQ · Cockpit CMSversion=0 <=2.6.0

Published CVSS scores

8.8TuranSecCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application
T1505.003Web Shell

Public exploit references

No public exploit references are available in this record.

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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