{"cve":"CVE-2026-107303","nvd":{"published":"2026-10-08T18:17:19.277","modified":"2026-10-09T12:17:07.987","status":"Awaiting Analysis","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N","score":7.6},"cwes":["CWE-79"],"references":["https://github.com/jhipster/generator-jhipster/commit/efe95edd4dedc3379735094936439410a51ce3d9","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/security/advisories/GHSA-9ffp-22j7-56r2"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-107303","score":0.00261,"percentile":0.17708,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-9ffp-22j7-56r2","url":"https://osv.dev/vulnerability/GHSA-9ffp-22j7-56r2","summary":"JHipster: Generated Applications Allow Stored XSS via Unrestricted Blob ContentType Opened as Same-Origin Blob","modified":"2026-10-08T18:00:09.700221111Z","packages":[{"ecosystem":"npm","name":"generator-jhipster","purl":"pkg:npm/generator-jhipster","ranges":["<9.4.0"],"fixed":["9.4.0"]},{"ecosystem":"npm","name":"react-jhipster","purl":"pkg:npm/react-jhipster","ranges":["<1.1.0"],"fixed":["1.1.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}