{"cve":"CVE-2026-9520","nvd":{"published":"2026-05-26T02:16:40.823","modified":"2026-07-23T11:10:00.120","status":"Deferred","description":"A weakness has been identified in blitz-js blitz up to 3.0.2 on GitHub. This impacts an unknown function of the file packages/generator/templates/app/src/app/auth/components/LoginForm.tsx of the component Sign-in. This manipulation of the argument Next causes cross site scripting. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","score":2.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-79","CWE-94"],"references":["https://gist.github.com/TrebledJ/164c7ca6c8208b63e6937bc11984720b","https://vuldb.com/submit/814378","https://vuldb.com/vuln/365540","https://vuldb.com/vuln/365540/cti"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-9520","score":0.00336,"percentile":0.27007,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-h2p9-cr4h-px24","url":"https://osv.dev/vulnerability/GHSA-h2p9-cr4h-px24","summary":"Blitz has a Cross-site Scripting issue","modified":"2026-06-30T17:56:29.939459Z","packages":[{"ecosystem":"npm","name":"blitz","purl":"pkg:npm/blitz","ranges":["<=3.0.2"],"fixed":[]}]}],"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."]}