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CVE-2026-105649— Ghost: Stored XSS via SVG Uploads Bypassing Sanitization

Quick assessment

Affected
TryGhost Ghost
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ghost 是一个基于 Node.js 的内容管理系统。在版本 4.22.0 到 6.65.0 之间，通过非 SVG 文件扩展名上传的 SVG 媒体缩略图和 SVG 图像在被存储时未经过安全净化处理。这允许任何拥有 staff（工作人员）权限的用户，包括“Contributor”（贡献者）角色，在该网站的域名下托管恶意脚本，可能导致其他 staff 用户的管理会话被入侵。该问题已在版本 6.65.0 中得到修复。

CVSS 7.3 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
TryGhost Ghost >= 4.22.0, < 6.65.0 affected
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I. Basic Information for CVE-2026-105649

Vulnerability Information
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Vulnerability Title
Ghost: Stored XSS via SVG Uploads Bypassing Sanitization
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
TryGhost Ghost >= 4.22.0, < 6.65.0 -

II. Public POCs for CVE-2026-105649

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III. Intelligence Information for CVE-2026-105649

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Other References for CVE-2026-105649 (4)

Same Patch Batch · TryGhost · 2026-10-05 · 20 CVEs total

CVE-2026-105642 8.8 HIGH Ghost: Remote Code Execution via Bookmark Card Images
CVE-2026-105650 8.1 HIGH Ghost: Stored XSS via oEmbed Photo Responses
CVE-2026-105675 7.5 HIGH Ghost: Invite Token Disclosure in Ghost Admin API
CVE-2026-105643 7.3 HIGH Ghost: Stored XSS via Embed Card Previews
CVE-2026-105651 7.3 HIGH Ghost: Stored XSS via Bookmark Card Images
CVE-2026-105679 7.3 HIGH Ghost: Stored XSS via File Uploads on Local Storage
CVE-2026-105677 7.2 HIGH Ghost: Remote Code Execution via Theme Translation Files
CVE-2026-105644 6.8 MEDIUM Ghost: Stored XSS via SVG Files in Content Imports
CVE-2026-105681 6.5 MEDIUM Ghost: Authorization Bypass in Comments Feature
CVE-2026-105680 6.5 MEDIUM Ghost: Authorization Issue Allowed Author Role to Delete any Post
CVE-2026-105646 4.9 MEDIUM Ghost: Regular Expression Denial of Service in Content Import
CVE-2026-105645 4.9 MEDIUM Ghost: Regular Expression Denial of Service in External Media Inliner
CVE-2026-105676 4.9 MEDIUM Ghost: Path Traversal via Locale Setting
CVE-2026-105678 4.3 MEDIUM Ghost: Editors Could Promote Staff Users to Their Own Role
CVE-2026-105647 4.0 MEDIUM Ghost: Server-Side Request Forgery in Bookmark Fetching
CVE-2026-105648 4.0 MEDIUM Ghost: Private IP Filtering Bypass via IPv6 Transition Addresses
CVE-2026-105683 3.8 LOW Ghost: Path Traversal Vulnerability in Ghost ImageSize Service
CVE-2026-105652 3.1 LOW Ghost: Password Hash Ordering Disclosure in Ghost Admin API
CVE-2026-105682 2.7 LOW Ghost: Server-Side Request Forgery in Webhook Trigger

IV. Related Vulnerabilities

Same product: Ghost
Same vendor: TryGhost
Same weakness: CWE-79

V. Comments for CVE-2026-105649

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