# CVE-2026-67444: Hubleys: Stored XSS via unrestricted background-image upload, served with an attacker-chosen Content-Type and no CSP protection

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- knrdl / hubleys-dashboard: < 0.5.2 (affected). Source: CNA: GitHub_M

## Severity and prioritization

- CVSS 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; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-79, CWE-434

## 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-mrq8 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/knrdl/hubleys-dashboard/commit/5a7f04c153295d48319d35fdd53e30f50288cd37 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/knrdl/hubleys-dashboard/releases/tag/v0.5.2 (CNA: GitHub_M; x_refsource_MISC)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-67444; retrieved 2026-11-13; source updated 2026-11-13

Revision: 72d982b6bdc7d846f9ca1cff7d69b3cb97036ae31fc2e3e663c2536522600afc

Canonical: https://y2.dev/cve/CVE-2026-67444

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