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CVE-2026-35200— Parse Server has a file upload Content-Type override via extension mismatch

Quick assessment

Affected
parse-community parse-server
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.

Parse Server是Parse Platform开源的一个开源后端，可以部署到任何可以运行 Node.js 的基础设施。 Parse Server 8.6.73之前版本和9.7.1-alpha.4之前版本存在安全漏洞，该漏洞源于文件上传时缺少Content-Type一致性验证，可能导致存储适配器提供不匹配的Content-Type。

AI Predicted 7.5 Difficulty: Easy EPSS 0.16% · P6

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2026-35200

Vulnerability Information
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Vulnerability Title
Parse Server has a file upload Content-Type override via extension mismatch
Source: CVE Program / CVE List V5
Vulnerability Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.73 and 9.7.1-alpha.4, a file can be uploaded with a filename extension that passes the file extension allowlist (e.g., .txt) but with a Content-Type header that differs from the extension (e.g., text/html). The Content-Type is passed to the storage adapter without consistency validation. Storage adapters that store and serve the provided Content-Type (such as S3 or GCS) serve the file with the mismatched Content-Type. The default GridFS adapter is not affected because it derives Content-Type from the filename at serving time. This vulnerability is fixed in 8.6.73 and 9.7.1-alpha.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
解释冲突
Source: CVE Program / CVE List V5
Vulnerability Title
Parse Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Parse Server是Parse Platform开源的一个开源后端，可以部署到任何可以运行 Node.js 的基础设施。 Parse Server 8.6.73之前版本和9.7.1-alpha.4之前版本存在安全漏洞，该漏洞源于文件上传时缺少Content-Type一致性验证，可能导致存储适配器提供不匹配的Content-Type。
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
parse-community parse-server >= 9.0.0, < 9.7.1-alpha.4 -

II. Public POCs for CVE-2026-35200

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III. Intelligence Information for CVE-2026-35200

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IV. Related Vulnerabilities

Same product: parse-server
Same vendor: parse-community
Same weakness: CWE-436

V. Comments for CVE-2026-35200

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