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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-34750— Payload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints

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是一个使用 TypeScript、Node.js、React 和 MongoDB 构建的 Headless CMS 和应用程序框架。 Payload 3.78.0之前版本存在路径遍历漏洞，该漏洞源于客户端上传签名URL端点未正确清理文件名，可能导致攻击者逃离预期存储位置。

CVSS 6.5 · Medium EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-34750

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Payload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
Payload is a free and open source headless content management system. Prior to version 3.78.0 in @payloadcms/storage-azure, @payloadcms/storage-gcs, @payloadcms/storage-r2, and @payloadcms/storage-s3, the client-upload signed-URL endpoints for S3, GCS, Azure, and R2 did not properly sanitize filenames. An attacker could craft filenames to escape the intended storage location. This issue has been patched in version 3.78.0 for @payloadcms/storage-azure, @payloadcms/storage-gcs, @payloadcms/storage-r2, and @payloadcms/storage-s3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Payload 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Payload是一个使用 TypeScript、Node.js、React 和 MongoDB 构建的 Headless CMS 和应用程序框架。 Payload 3.78.0之前版本存在路径遍历漏洞，该漏洞源于客户端上传签名URL端点未正确清理文件名，可能导致攻击者逃离预期存储位置。
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)

Shenlong Deep Dive — AI Deep Analysis

10-question deep dive: root cause, exploitation, mitigation, urgency. Read summary free, full version requires login.

Read summary Full analysis (login)

Affected Products

Vendor Product Affected Versions CPE Subscribe
payloadcms payload < 3.78.0 -

II. Public POCs for CVE-2026-34750

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-34750

请登录查看更多情报信息。

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-2026-34746 7.7 HIGH Payload has Authenticated SSRF via Upload Functionality
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-22

V. Comments for CVE-2026-34750

No comments yet

Leave a comment