Auth bypass in Tryghost Ghost
CVE-2026-103273
Ghost versions 4.3.0 before 6.58.0 contain an authentication bypass vulnerability where lower-privilege staff users can use staff tokens to bypass post editing restrictions. Attackers with staff credentials can leverage tokens to edit posts beyond their assigned privilege level.
Vulnerability class: Broken Access Control
Published .
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
Weakness classification (CWE)
References
- github.com/TryGhost/Ghost/security/advisories/GHSA-jj85-wvj2-r86m (vendor-advisory)
- www.vulncheck.com/advisories/ghost-4.3.0-before-6.58.0-incorrect-authorization-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103273?
- CVE-2026-103273 is a medium-severity vulnerability in Tryghost Ghost, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-10-01.
- How severe is CVE-2026-103273?
- Medium severity. CVSS v3 base score is 4.3 out of 10.