CVE-2026-105649

HIGH 7.3

Ghost: Stored XSS via SVG Uploads Bypassing Sanitization

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79 CWE-434
Vendor	tryghost
Product	ghost
Published	Oct 5, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

TryGhost / Ghost

>= 4.22.0, < 6.65.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/TryGhost/Ghost/security/advisories/GHSA-8575-cr6v-7jh4 github.com: https://github.com/TryGhost/Ghost/issues/30919 github.com: https://github.com/TryGhost/Ghost/commit/80686226d23df56749f6b7ebb484850a8eba8072 github.com: https://github.com/TryGhost/Ghost/releases/tag/v6.65.0