High severity · published Oct 5, 2026
CVE-2026-105649
Ghost: Stored XSS via SVG Uploads Bypassing Sanitization
7.3
CVSS
0.3%
EPSS
No
On KEV
Description
Ghost is a Node.js content management system. From 4.22.0 until 6.65.0, SVG media thumbnails and SVG images uploaded with a non-SVG file extension were stored without sanitization. This allowed any staff user, including Contributors, to host scripts on the site's domain, possibly resulting in compromise of other staff users' admin sessions. This issue is fixed in version 6.65.0.
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 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GH
Ghost · TryGhost
>= 4.22.0, < 6.65.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105649
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-105649
x_refsource_CONFIRM
https://github.com/TryGhost/Ghost/security/advisories/GHSA-8575-cr6v-7jh4
x_refsource_MISC
https://github.com/TryGhost/Ghost/issues/30919
x_refsource_MISC
https://github.com/TryGhost/Ghost/commit/80686226d23df56749f6b7ebb484850a8eba8072
x_refsource_MISC
https://github.com/TryGhost/Ghost/releases/tag/v6.65.0
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