CVE-2026-103267

MEDIUM 4.3

Ghost 0.5.0 before 6.62.0 Arbitrary Email Registration via Staff Invite

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

Ghost versions before 6.62.0 contain an authentication bypass vulnerability in staff invite acceptance that allows users to specify any email address when creating their account. Attackers can accept leaked invite tokens with attacker-controlled email addresses, or legitimate recipients can register with unintended email providers.

CWE	CWE-807
Vendor	tryghost
Product	ghost
Published	Oct 1, 2026

Stay Ahead of the Next One

Get instant alerts for tryghost ghost

Be the first to know when new medium vulnerabilities affecting tryghost ghost are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

TryGhost / Ghost

0.5.0 < 6.62.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/TryGhost/Ghost/security/advisories/GHSA-xcgh-2828-cvmx vulncheck.com: https://www.vulncheck.com/advisories/ghost-0.5.0-before-6.62.0-arbitrary-email-registration-via-staff-invite

Credits

🔍 unknownhad 🔍 doanmanhducz 🔍 EclipsSec