CVE-2026-38991
Cockpit Vulnerable to Unrestricted Upload of File with Dangerous Type
8.8
HIGH
CVSS 3.1
EPSS 0.03%
Description
Cockpit versions 2.13.5 and earlier are 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.
How to fix CVE-2026-38991
To remediate CVE-2026-38991, upgrade the affected package to a fixed version below.
- —upgrade to 2.14.0 or later
Is CVE-2026-38991 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2.14.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |