What’s Vulnerable › Vulnerabilities

CVE-2026-16504: VPS.org one-click Zulip template deployment instance contains multiple vulnerabilities

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-31 · updated 2026-10-23
• Weakness: CWE-321

Description

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

Affected products

• VPS.org Zulip template: all versions

References

• https://kb.cert.org/vuls/id/243636

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