What’s Vulnerable › Vulnerabilities

CVE-2026-38991

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-29 · updated 2026-06-17
• Weakness: CWE-434

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

• https://felsec.com/posts/cockpit-cms-2.13.5-multi-vulns/
• https://github.com/Cockpit-HQ/Cockpit/releases/tag/2.14.0
• https://felsec.com/posts/cockpit-cms-2.13.5-multi-vulns/

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