Medium severity · published Oct 5, 2026
CVE-2026-105646
Ghost: Regular Expression Denial of Service in Content Import
4.9
CVSS
0.3%
EPSS
No
On KEV
Description
Ghost is a Node.js content management system. From 4.0.0 until 6.67.0, a crafted content import file 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
>= 4.0.0, < 6.67.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105646
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-105646
x_refsource_CONFIRM
https://github.com/TryGhost/Ghost/security/advisories/GHSA-fwh9-qg68-vxp4
x_refsource_MISC
https://github.com/TryGhost/Ghost/pull/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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