Description
Cockpit 2.13.5 and earlier is affected by a misconfiguration within the Bucket component _isFileTypeAllowed function where a specially crafted filename bypasses an extension filter. This allows an authenticated attacker to rename arbitrary files with the .php file extension enabling arbitrary code to be executed on the underlying server.
Published: 2026-04-29
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-j2rx-4jg9-79mw Cockpit Vulnerable to Unrestricted Upload of File with Dangerous Type
History

Sat, 02 May 2026 01:00:00 +0000

Type Values Removed Values Added
Title Authenticated File Rename Allows PHP Execution in Cockpit CMS

Fri, 01 May 2026 06:00:00 +0000

Type Values Removed Values Added
Title Arbitrary PHP File Rename Enabling Server‑Side Code Execution in Cockpit CMS
Weaknesses CWE-20
CWE-73

Wed, 29 Apr 2026 21:45:00 +0000

Type Values Removed Values Added
Title Arbitrary PHP File Rename Enabling Server‑Side Code Execution in Cockpit CMS
Weaknesses CWE-20
CWE-73

Wed, 29 Apr 2026 21:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-434
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 29 Apr 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Cockpit-hq
Cockpit-hq cockpit
Vendors & Products Cockpit-hq
Cockpit-hq cockpit

Wed, 29 Apr 2026 15:30:00 +0000

Type Values Removed Values Added
Description Cockpit 2.13.5 and earlier is affected by a misconfiguration within the Bucket component _isFileTypeAllowed function where a specially crafted filename bypasses an extension filter. This allows an authenticated attacker to rename arbitrary files with the .php file extension enabling arbitrary code to be executed on the underlying server.
References

Subscriptions

Cockpit-hq Cockpit
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-04-29T20:23:41.211Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-38991

cve-icon Vulnrichment

Updated: 2026-04-29T20:21:38.753Z

cve-icon NVD

Status : Deferred

Published: 2026-04-29T16:16:23.797

Modified: 2026-04-29T21:22:20.120

Link: CVE-2026-38991

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-02T00:45:30Z

Weaknesses