Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-22707— Strapi Upload Plugin MIME Validation Bypass via Content API

Quick assessment

Affected
strapi strapi
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.

Strapi是法国strapi社区的一套开源的内容管理系统（CMS）。 Strapi 5.33.3之前版本存在代码问题漏洞，该漏洞源于Upload插件的Content API端点未强制执行管理员配置的MIME类型限制，可能导致经过身份验证的用户上传管理员明确禁止的文件类型（如HTML和SVG内容），当管理员直接打开时执行JavaScript，实现管理员会话劫持。

AI Predicted 8.8 Difficulty: Easy EPSS 0.19% · P8

Affected Version Matrix 2

VendorProduct Version RangeStatus
strapi @strapi/upload < 5.33.3 affected
strapi strapi < 5.33.3 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-22707

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Strapi Upload Plugin MIME Validation Bypass via Content API
Source: CVE Program / CVE List V5
Vulnerability Description
Strapi is an open source headless content management system. In Strapi versions prior to 5.33.3, the Upload plugin's Content API endpoints did not enforce the administrator-configured MIME type restrictions (`plugin.upload.security.allowedTypes` and `deniedTypes`). The same restrictions were correctly enforced on the Admin Panel upload path. The upload plugin's `enforceUploadSecurity` security check was invoked in the admin upload controller but was missing from the Content API controller. The Content API handlers `uploadFiles` and `replaceFile` (and the `upload` wrapper that dispatches to them) called the underlying upload service directly, bypassing both the magic-byte MIME detection and the configured allow/deny lists. An authenticated user with the Content API upload permission could therefore upload file types the administrator had explicitly disallowed, including HTML and SVG content. In deployments serving uploaded files from the same origin as the admin panel (default), an attacker could upload an HTML or SVG file that, when opened directly by an admin, executed JavaScript in the admin origin, enabling admin-session hijack and authenticated administrative actions against the admin API. The patch in version 5.33.3 introduces a shared `prepareUploadRequest` helper that wraps `enforceUploadSecurity` and is called from both the Content API and admin upload controllers, ensuring identical security policy enforcement on every upload entry point.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA: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
Strapi 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Strapi是法国strapi社区的一套开源的内容管理系统（CMS）。 Strapi 5.33.3之前版本存在代码问题漏洞，该漏洞源于Upload插件的Content API端点未强制执行管理员配置的MIME类型限制，可能导致经过身份验证的用户上传管理员明确禁止的文件类型（如HTML和SVG内容），当管理员直接打开时执行JavaScript，实现管理员会话劫持。
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

Vendor Product Affected Versions CPE Subscribe
strapi strapi < 5.33.3 -
strapi @strapi/upload < 5.33.3 -

II. Public POCs for CVE-2026-22707

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-22707

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-22707 (1)

Same Patch Batch · strapi · 2026-05-14 · 5 CVEs total

CVE-2026-22706 Strapi: Password Reset Does Not Revoke Existing Refresh Sessions
CVE-2026-22599 Strapi Vulnerable to SQL Injection in Content Type Builder
CVE-2026-27886 Strapi may leak sensitive data via relational filtering due to lack of query sanitization
CVE-2025-64526 Strapi has a rate limit bypass on users-permissions plugin via attacker-controlled email k

IV. Related Vulnerabilities

Same product: strapi
Same vendor: strapi
Same weakness: CWE-434

V. Comments for CVE-2026-22707

No comments yet

Leave a comment