high8.8
CVE-2026-38991
Cockpit 2.13.5 and earlier is affected by a misconfiguration within the Bucket component _isFileTypeAllowed function where a specially crafted filename bypasse…
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | cockpit-hq/cockpit | < 2.14.0 | 2.14.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-j2rx-4jg9-79mw
- https://nvd.nist.gov/vuln/detail/CVE-2026-38991
- 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/