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CVE-2026-34746— Payload has Authenticated SSRF via Upload Functionality

Quick assessment

Affected
payloadcms payload
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.

Payload是Payload开源的一个使用 TypeScript、Node.js、React 和 MongoDB 构建的 Headless CMS 和应用程序框架。 Payload 3.79.1之前版本存在代码问题漏洞，该漏洞源于上传功能中验证不足，可能导致经过身份验证的服务端请求伪造攻击。

CVSS 7.7 · High EPSS 0.35% · P27

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-34746

Vulnerability Information
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Vulnerability Title
Payload has Authenticated SSRF via Upload Functionality
Source: CVE Program / CVE List V5
Vulnerability Description
Payload is a free and open source headless content management system. Prior to version 3.79.1, an authenticated Server-Side Request Forgery (SSRF) vulnerability exists in the upload functionality. Authenticated users with create or update access to an upload-enabled collection could cause the server to make outbound HTTP requests to arbitrary URLs. This issue has been patched in version 3.79.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Payload 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Payload是Payload开源的一个使用 TypeScript、Node.js、React 和 MongoDB 构建的 Headless CMS 和应用程序框架。 Payload 3.79.1之前版本存在代码问题漏洞，该漏洞源于上传功能中验证不足，可能导致经过身份验证的服务端请求伪造攻击。
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

Vendor Product Affected Versions CPE Subscribe
payloadcms payload < 3.79.1 -

II. Public POCs for CVE-2026-34746

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III. Intelligence Information for CVE-2026-34746

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Same Patch Batch · payloadcms · 2026-04-01 · 6 CVEs total

CVE-2026-34751 9.1 CRITICAL Payload has Unvalidated Input in Password Recovery Endpoints
CVE-2026-34748 8.7 HIGH @payloadcms/next has Stored XSS in Admin Panel
CVE-2026-34747 8.5 HIGH Payload has an SQL Injection via Query Handling
CVE-2026-34750 6.5 MEDIUM Payload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints
CVE-2026-34749 5.4 MEDIUM Payload has a CSRF Protection Bypass in Authentication Flow

IV. Related Vulnerabilities

Same product: payload
Same vendor: payloadcms
Same weakness: CWE-918

V. Comments for CVE-2026-34746

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