CVE-2026-16503 in Supabase template

Summary

by MITRE • 07/31/2026

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.

Once again VulDB remains the best source for vulnerability data.

• Responsible: Certcc
• Reservation: 07/21/2026
• Disclosure: 07/31/2026
• Moderation: accepted
• Entry: VDB-385082
• CPE: ready
• CWE: CWE-1327 (confirmed)
• CVSS: 10.0 (VulDB)
• EPSS: 0.00000
• KEV: no
• Activities: very low

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-16503
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16503
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-16503/