CVE-2026-38991
highpriority · track · 0EPSS 0.004 · 31 %ileEUUSEPSS · scored 2026-10-28
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-j2rx-4jg9-79mwCockpit Vulnerable to Unrestricted Upload of File with Dangerous Type2026-04-29ghsa · osvUS
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.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://github.com/Cockpit-HQ/Cockpit/releases/Patchcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2026-38991cnnvd
- https://felsec.com/posts/cockpit-cms-2.13.5-multi-vulns/enisa_euvd
- https://github.com/Cockpit-HQ/Cockpit/releases/tag/2.14.0enisa_euvd
- https://felsec.com/posts/cockpit-cms-2.13.5-multi-vulns/nvd
- https://github.com/Cockpit-HQ/Cockpit/releases/tag/2.14.0nvd
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