Medium severity · published Oct 1, 2026
CVE-2026-103273
Ghost 4.3.0 before 6.58.0 Incorrect Authorization via Staff Token
4.3
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GH
Ghost · TryGhost
4.3.0 before 6.58.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103273
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103273
vendor-advisory
https://github.com/TryGhost/Ghost/security/advisories/GHSA-jj85-wvj2-r86m
third-party-advisory
https://www.vulncheck.com/advisories/ghost-4.3.0-before-6.58.0-incorrect-authorization-via-staff-token
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