CVE-2026-107303 · GHSA-9ffp-22j7-56r2

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

Risk score: 54/100
CVSS: 7.6 v3.1
Exploit chance (30 days): 0.3%
Published: 8 Oct 2026

Open in the live forecast Today's forecast

What to know

What it is: 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 generate…
Affected: generator-jhipster (npm) < 9.4.0; react-jhipster (npm) <= 1.0.3
Fix: Upgrade generator-jhipster to 9.4.0; react-jhipster to 1.1.0 or later.
Exploitation: No known exploitation

Story map

Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

generator-jhipster: Amber, patch this week. JHipster is a development platform to quickly generate, develop, and deploy modern web applications and microservice architectures. From 7.0.0 until 9.4.0, reactive applications generated with Spring WebFlux, Spring Data R2DBC, and a SQL database pass the attacker-controlled sort request parameter from paginated entit…

The flaws

CVE-2026-107303: JHipster: Generated Applications Allow Stored XSS via Unrestricted Blob ContentType Opened as Same-Origin Blob (CVSS 7.6 · EPSS 0%)
CVE-2026-107375: JHipster: SQL Injection in the Parameter of JHipster-Generated Reactive (WebFlux + R2DBC) Applicationssort (CVSS 8.8 · EPSS 0%)

The fix

Upgrade generator-jhipster: 9.4.0 or later on your release line

Who is exposed: generator-jhipster (npm) >= 7.0.0, < 9.4.0

Where it stands

No known exploitation

Connects to

Same weakness: Cross-site scripting (CWE-79). 400 other warnings in 30 days

Why it is Yellow

CVSS 7.6 high
On your watchlist: npm

Affected packages

Package	Ecosystem	Vulnerable	Fixed in
generator-jhipster	npm	< 9.4.0	9.4.0
react-jhipster	npm	<= 1.0.3	1.1.0

References

Original 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.

Last activity 8 Oct 2026. Patch Forecast updates every hour.