CVE-2026-16503 — CRITICAL (9.1)

Vulnerability Description

Deployment of the VPS.org one-click Supabase template deploys a PostgreSQL instance that is published on all interfaces (0.0.0.0:5432) with a default database password set to "postgres". Because Docker installs its own iptables rules, this exposure bypasses a standard host UFW configuration.

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

NONE

Related Weaknesses (CWE)

CWE-1188 CWE-1327 CWE-1393

References

https://kb.cert.org/vuls/id/243636

FAQ

What is CVE-2026-16503?

CVE-2026-16503 is a vulnerability with a CVSS score of 9.1 (CRITICAL). Deployment of the VPS.org one-click Supabase template deploys a PostgreSQL instance that is published on all interfaces (0.0.0.0:5432) with a default database password set to "postgres". Because Docke...

How severe is CVE-2026-16503?

CVE-2026-16503 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-16503?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.