Ghost: Stored XSS via SVG Uploads Bypassing Sanitization

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-105649
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-05 20:17:13 UTC
Updated2026-10-05 20:17:13 UTC
DescriptionGhost 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.

Risk And Classification

Primary CVSS: v3.1 7.3 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Problem Types: CWE-79 | CWE-434 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CWE-434 CWE-434: Unrestricted Upload of File with Dangerous Type

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.3HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
3.1CNADECLARED7.3HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA TryGhost Ghost affected >= 4.22.0, < 6.65.0 Not specified

References

ReferenceSourceLinkTags
github.com/TryGhost/Ghost/issues/30919 [email protected] github.com
github.com/TryGhost/Ghost/releases/tag/v6.65.0 [email protected] github.com
github.com/TryGhost/Ghost/commit/80686226d23df56749f6b7ebb484850a8eba8072 [email protected] github.com
github.com/TryGhost/Ghost/security/advisories/GHSA-8575-cr6v-7jh4 [email protected] github.com
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