High severity · published Oct 1, 2026
CVE-2026-103278
Ghost 5.8.0 before 6.34.0 Staff Account Takeover via Admin iframe
7.3
CVSS
0.3%
EPSS
No
On KEV
Description
Ghost versions 5.8.0 before 6.34.0 contain an input validation vulnerability in the admin iframe that allows attackers to take over staff user accounts. Attackers with content publishing privileges can craft malicious pages that, when visited by active staff users, enable account takeover through improper input validation.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GH
Ghost · TryGhost
5.8.0 before 6.34.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103278
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103278
vendor-advisory
https://github.com/TryGhost/Ghost/security/advisories/GHSA-5pxf-whwv-g54g
third-party-advisory
https://www.vulncheck.com/advisories/ghost-5.8.0-before-6.34.0-staff-account-takeover-via-admin-iframe
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