Medium severity · published Oct 5, 2026
CVE-2026-105645
Ghost: Regular Expression Denial of Service in External Media Inliner
4.9
CVSS
0.3%
EPSS
No
On KEV
Description
Ghost is a Node.js content management system. From 5.37.0 until 6.67.0, a crafted request to the external media inliner could cause excessive CPU usage, making the Ghost server unresponsive. Exploiting this requires Administrator access. This issue is fixed in version 6.67.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GH
Ghost · TryGhost
>= 5.37.0, < 6.67.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105645
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-105645
x_refsource_CONFIRM
https://github.com/TryGhost/Ghost/security/advisories/GHSA-9m4w-fmjw-fvjq
x_refsource_MISC
https://github.com/TryGhost/Ghost/issues/31058
x_refsource_MISC
https://github.com/TryGhost/Ghost/commit/88ae6d6d56f8a239cb38a8c89de02f034f50e2ce
x_refsource_MISC
https://github.com/TryGhost/Ghost/releases/tag/v6.66.0
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