CVE-2026-16504 in Zulip

Summary

by MITRE • 07/31/2026

Deployment of the VPS.org one-click Zulip template deploys a hardcoded application signing key, a default database password ("zulip"), and DISABLE_HTTPS=True.

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• Responsible: Certcc
• Reservation: 07/21/2026
• Disclosure: 07/31/2026
• Moderation: accepted
• Entry: VDB-385089
• CPE: ready
• CWE: CWE-1188 (confirmed)
• CVSS: 7.3 (VulDB)
• EPSS: 0.00000
• KEV: no
• Activities: very low

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-16504
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16504
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-16504/