CVE-2026-67444
Hubleys: Stored XSS via unrestricted background-image upload, served with an attacker-chosen Content-Type and no CSP protection
Hubleys is a dashboard for self-hosted services. Prior to version 0.5.2, any authenticated (non-admin) Hubleys user can upload a file with an arbitrary extension as their dashboard "background image," and the server will later serve that file back with a Content-Type derived straight from the attacker's chosen extension - so uploading an .html file gets it served as text/html. Because the endpoint that serves it returns a manually-constructed response rather than going through SvelteKit's normal page-rendering pipeline, the app's configured Content-Security-Policy never gets attached to it either, so a script embedded in the upload runs unrestricted. This issue has been patched in version 0.5.2.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| hubleys-dashboard knrdl |
< 0.5.2 (affected) | CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.1 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/knrdl/hubleys-dashboard/security/advisories/GHSA-j2w9-hhqw-mrq8CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/knrdl/hubleys-dashboard/commit/5a7f04c153295d48319d35fdd53e30f50288cd37CNA: GitHub_M · x_refsource_MISC
- https://github.com/knrdl/hubleys-dashboard/releases/tag/v0.5.2CNA: GitHub_M · x_refsource_MISC
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