---
title: "CVE-2026-107303: JHipster - Stored XSS"
description: "JHipster prior to generator-jhipster 9.4.0 and react-jhipster 1.1.0 contains a stored XSS caused by persisting attacker-controlled Blob data and ContentType values, letting authenticated users with write access execute active HTML or SVG under application origin, exploit depends on CSP and browser Blob behavior."
url: https://panop.io/threat-heartbeat/CVE-2026-107303/
---

# CVE-2026-107303 JHipster - Stored XSS

JHipster prior to generator-jhipster 9.4.0 and react-jhipster 1.1.0 contains a stored XSS caused by persisting attacker-controlled Blob data and ContentType values, letting authenticated users with write access execute active HTML or SVG under application origin, exploit depends on CSP and browser Blob behavior.

CVSS base score 7.6 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.26% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-107303)

## Details

Type

Stored XSS

Impact

Stored XSS

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Published

8 October 2026

Updated

15 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Upgrade to generator-jhipster 9.4.0 and react-jhipster 1.1.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-107303](https://nvd.nist.gov/vuln/detail/CVE-2026-107303)
- [https://github.com/jhipster/generator-jhipster/commit/efe95edd4dedc3379735094936439410a51ce3d9](https://github.com/jhipster/generator-jhipster/commit/efe95edd4dedc3379735094936439410a51ce3d9)
- [https://github.com/jhipster/generator-jhipster/pull/34807](https://github.com/jhipster/generator-jhipster/pull/34807)
- [https://github.com/jhipster/generator-jhipster/releases/tag/v9.4.0](https://github.com/jhipster/generator-jhipster/releases/tag/v9.4.0)
- [https://github.com/jhipster/generator-jhipster/security/advisories/GHSA-9ffp-22j7-56r2](https://github.com/jhipster/generator-jhipster/security/advisories/GHSA-9ffp-22j7-56r2)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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