Vulnerability · Published Oct 1, 2026 · Assigned by VulnCheck
CVE-2026-103267Ghost 0.5.0 before 6.62.0 Arbitrary Email Registration via Staff Invite
Medium 4.3
In plain English
A medium-severity security flaw in Ghost from TryGhost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 18% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 81.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-807 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
References
- GitHub Security Advisory (GHSA-xcgh-2828-cvmx) vendor-advisory
- VulnCheck Advisory: Ghost 0.5.0 before 6.62.0 Arbitrary Email Registration via Staff Invite third-party-advisory