High severity · published Oct 1, 2026
CVE-2026-103283
Ghost 6.20.0 before 6.57.1 Authentication Bypass via Session Handling
8.1
CVSS
0.3%
EPSS
No
On KEV
Description
Ghost versions 6.20.0 before 6.57.1 contain a session handling vulnerability that allows authenticated staff users to log in as any other staff user with only the password, bypassing two-factor authentication. Attackers with valid staff credentials can exploit improper session management to impersonate other staff members and gain unauthorized access to administrative functions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
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
6.20.0 before 6.57.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103283
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103283
vendor-advisory
https://github.com/TryGhost/Ghost/security/advisories/GHSA-q55r-w7fh-rmh6
third-party-advisory
https://www.vulncheck.com/advisories/ghost-6.20.0-before-6.57.1-authentication-bypass-via-session-handling
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