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

CVSS 6.5 · Medium EPSS 0.08% · P24
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I. Basic Information for CVE-2026-34750

Vulnerability Information
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Vulnerability Title
Payload has Insufficient Filename Validation in Client-Upload Signed-URL Endpoints
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
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)

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Affected Products

VendorProductAffected VersionsCPESubscribe
payloadcmspayload < 3.78.0 -

II. Public POCs for CVE-2026-34750

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III. Intelligence Information for CVE-2026-34750

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

CVE-2026-347519.1 CRITICALPayload has Unvalidated Input in Password Recovery Endpoints
CVE-2026-347488.7 HIGH@payloadcms/next has Stored XSS in Admin Panel
CVE-2026-347478.5 HIGHPayload has an SQL Injection via Query Handling
CVE-2026-347467.7 HIGHPayload has Authenticated SSRF via Upload Functionality
CVE-2026-347495.4 MEDIUMPayload 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

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