What is CVE-2026-103267?

CVE-2026-103267 is a medium-severity vulnerability in Tryghost Ghost, classified under CWE-807. CVSS score: 4.3/10. Published 2026-10-01.

How severe is CVE-2026-103267?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Tryghost Ghost

CVE-2026-103267

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.

Published 2026-10-01.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Tryghost Ghost

Weakness classification (CWE)

CWE-807

References

github.com/TryGhost/Ghost/security/advisories/GHSA-xcgh-2828-cvmx (vendor-advisory)
www.vulncheck.com/advisories/ghost-0.5.0-before-6.62.0-arbitrary-email-registra… (third-party-advisory)

Frequently asked questions

What is CVE-2026-103267?: CVE-2026-103267 is a medium-severity vulnerability in Tryghost Ghost, classified under CWE-807. CVSS score: 4.3/10. Published 2026-10-01.
How severe is CVE-2026-103267?: Medium severity. CVSS v3 base score is 4.3 out of 10.