CVE-2026-105643

Ghost: Stored XSS via Embed Card Previews

State: Published
Severity: 7.3 High
Published: Oct 5, 2026
Updated: Oct 6, 2026
Reserved: Oct 5, 2026

Description

Ghost is a Node.js content management system. From version 6.34.0 until 6.67.0, embed cards in the Ghost editor could bypass protections against stored cross-site scripting. Any staff user, including Contributors, could store scripts in post content that ran when another staff user opened the post in the editor, potentially compromising that user’s admin session. Self-hosted sites should leave the new security.embedPreviewUrl configuration option at its default value. This issue is fixed in version 6.67.0.

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-653 Improper Isolation or Compartmentalization

Affected Products

Product	Versions
GhostTryGhost	>= 6.34.0, < 6.67.0Affected

References

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