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CVE-2026-107303— JHipster: Generated Applications Allow Stored XSS via Unrestricted Blob ContentType Opened as Same-Origin Blob

Quick assessment

Affected
jhipster generator-jhipster
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.

JHipster 是一个用于快速生成、开发和部署现代 Web 应用及微服务架构的开发平台。在 generator-jhipster 9.4.0 和 react-jhipster 1.1.0 版本之前，生成的应用程序可能持久化攻击者控制的 Blob 数据及其对应的 ContentType 值，并通过生成的 REST 端点返回这些数据。随后，这些数据会被传递给生成代码中的 openFile 辅助函数（位于 generators/client/generators/common/templates/src/main/we

CVSS 7.6 · High

Affected Version Matrix 2

VendorProduct Version RangeStatus
jhipster generator-jhipster < 9.4.0 affected
jhipster react-jhipster < 1.1.0 affected
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I. Basic Information for CVE-2026-107303

Vulnerability Information
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Vulnerability Title
JHipster: Generated Applications Allow Stored XSS via Unrestricted Blob ContentType Opened as Same-Origin Blob
Source: CVE Program / CVE List V5
Vulnerability Description
JHipster is a development platform to quickly generate, develop, and deploy modern web applications and microservice architectures. Prior to generator-jhipster 9.4.0 and react-jhipster 1.1.0, generated applications can persist attacker-controlled Blob data and companion ContentType values, return them through generated REST endpoints, and pass them to the generated openFile helper in generators/client/generators/common/templates/src/main/webapp/app/shared/jhipster/data-utils.ts.ejs. The helper uses the returned ContentType as the browser Blob MIME type and opens an object URL, so a normal authenticated user with write access to a Blob-bearing entity can store active HTML or SVG content that may execute under the application origin when a privileged user opens it. Exploitability depends on the generated application's content security policy and target-browser Blob behavior. This issue is fixed in generator-jhipster 9.4.0 and react-jhipster 1.1.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
jhipster generator-jhipster < 9.4.0 -
jhipster react-jhipster < 1.1.0 -

II. Public POCs for CVE-2026-107303

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III. Intelligence Information for CVE-2026-107303

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Patches & Fixes for CVE-2026-107303 (2)

Other References for CVE-2026-107303 (2)

IV. Related Vulnerabilities

Same product: generator-jhipster
Same vendor: jhipster
Same weakness: CWE-79

V. Comments for CVE-2026-107303

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