CVE-2026-53948— Ghost: File Upload Content-Type Spoofing
Possible ATT&CK Techniques 2AI
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I. Basic Information for CVE-2026-53948
Vulnerability Information
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Vulnerability Title
Ghost: File Upload Content-Type Spoofing
Source: CVE Program / CVE List V5
Vulnerability Description
Ghost is a Node.js content management system. From 6.19.4 until 6.21.1, insufficient validation of the client-supplied Content-Type on Ghost's Admin API file upload endpoint allowed uploaded files to be served from the site with an attacker-chosen content type on S3/GCS storage backends. On installations that serve uploaded files from the same origin as the site, this could have been used to facilitate stored cross-site scripting against site visitors or staff. This vulnerability is fixed in 6.21.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Ghost 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ghost是Ghost基金会开源的一款内容管理平台。 Ghost 6.19.4版本至6.21.1之前版本存在任意文件上传漏洞，该漏洞源于对客户端提供的Content-Type验证不足，可能导致存储型跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-53948
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Vendor Advisories for CVE-2026-53948 (1)
- 🔗 File Upload Content-Type Spoofing · Advisory · TryGhost/Ghost · GitHubx_refsource_CONFIRM
Same Patch Batch · TryGhost · 2026-06-24 · 8 CVEs total
| CVE-2026-53943 | 9.6 CRITICAL | Ghost: Cache-poisoning XSS in Ghost frontend via x-ghost-preview header |
| CVE-2026-53950 | 7.5 HIGH | @tryghost/activitypub: XSS in Ghost's ActivityPub client |
| CVE-2026-53944 | 5.8 MEDIUM | Ghost: Private IP filtering bypass to make server-side requests to internal services |
| CVE-2026-53946 | 5.4 MEDIUM | Ghost: Mobiledoc image-size fetch SSRF |
| CVE-2026-53947 | 5.3 MEDIUM | Ghost: Member existence leak via magic link sign-in response |
| CVE-2026-53949 | 5.3 MEDIUM | Ghost Content API filter bypass reveals private fields |
| CVE-2026-53945 | 4.0 MEDIUM | Ghost: Server-side request forgery via DNS rebinding in external request handling |
IV. Related Vulnerabilities
Same product: Ghost
Same vendor: TryGhost
Same weakness: CWE-434
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Remote Code Execution via Unrestricted File Upload in ATutor - CVE-2026-74018
WordPress Warehouse Cargo theme <= 2.6.9 - Arbitrary File Up - CVE-2026-74016
WordPress Smart Cleaning theme <= 4.8.6 - Arbitrary File Upl
V. Comments for CVE-2026-53948
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