CVE-2026-107303

HIGHPre-NVD 7.67.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (16th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.6Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
7.6
EG Score
7.6HIGHmedium confidence
EG Risk
50
EG Risk 50/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity76% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 8, 2026

Last Modified

October 9, 2026

Advisory Details (4)

Auto-updated Oct 8, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

Release v9.4.0 (jhipster/generator-jhipster)

Patch available: jhipster/generator-jhipster v9.4.0

https://github.com/jhipster/generator-jhipster/releases/tag/v9.4.0
github_commit

commit efe95edd4ded (jhipster/generator-jhipster)

Fix landed in jhipster/generator-jhipster commit efe95edd4ded — awaiting tagged release

https://github.com/jhipster/generator-jhipster/commit/efe95edd4dedc3379735094936439410a51ce3d9
github_pr

client: open stored blobs as a download unless the content type is al…

Fix merged in jhipster/generator-jhipster PR #34807 on 2026-09-05 — awaiting tagged release

https://github.com/jhipster/generator-jhipster/pull/34807
githubMentions a patch (unverified)🟡 PoC Available

Generated Applications Allow Stored XSS via Unrestricted Blob ContentType Opened as Same-Origin Blob · Advisory · jhipster/generator-jhipster · GitHub

https://github.com/jhipster/generator-jhipster/security/advisories/GHSA-9ffp-22j7-56r2

Vendor Advisories for CVE-2026-107303(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 1 ecosystem)
npm(2)
PackageVulnerable rangeFix by version rangeDependents
generator-jhipster—
  • every version up to 9.4.0: fixed in 9.4.0
—
react-jhipster—
  • every version up to 1.1.0: fixed in 1.1.0
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 7× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-10-10 01:22 UTCEG score recompute
  2. 2026-10-09 20:06 UTCEPSS rescore
  3. 2026-10-09 12:34 UTCEG score recompute
  4. 2026-10-09 11:55 UTCEG score recompute
  5. 2026-10-08 18:36 UTCEG score recompute
  6. 2026-10-08 17:30 UTCEG score recompute
  7. 2026-10-08 17:29 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-107303?
CVE-2026-107303 is a high vulnerability published on October 8, 2026. 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…
When was CVE-2026-107303 disclosed?
CVE-2026-107303 was first published on October 8, 2026, with the most recent update on October 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-107303 actively exploited?
CVE-2026-107303 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107303?
CVE-2026-107303 has a CVSS base score of 7.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107303?
A fix for CVE-2026-107303 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-107303 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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