Medium severity · published Oct 5, 2026
CVE-2026-105648
Ghost: Private IP Filtering Bypass via IPv6 Transition Addresses
4.0
CVSS
0.3%
EPSS
No
On KEV
Description
Ghost is a Node.js content management system. From 6.0.9 until 6.65.0, a validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network on some network configurations. A successful attack would not result in any response data being returned. This issue is fixed in version 6.65.0.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GH
Ghost · TryGhost
>= 6.0.9, < 6.65.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105648
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-105648
x_refsource_CONFIRM
https://github.com/TryGhost/Ghost/security/advisories/GHSA-r7f2-6fj8-6fg2
x_refsource_MISC
https://github.com/TryGhost/Ghost/pull/30917
x_refsource_MISC
https://github.com/TryGhost/Ghost/commit/20d3f792bf4a7c349ee56b746a067550d8684ff5
x_refsource_MISC
https://github.com/TryGhost/Ghost/releases/tag/v6.65.0
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