CVE-2026-9520blitz-js blitz Sign-in LoginForm.tsx cross site scripting
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
- Weakness (CWE)
- CWE-79, CWE-94
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- May 27, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
blitz-js blitz blitz-js:blitz | 3.0.0; 3.0.1; 3.0.2 | CNA record |
References
- https://vuldb.com/vuln/365540vdb-entry, technical-description
- https://vuldb.com/vuln/365540/ctisignature, permissions-required
- https://vuldb.com/submit/814378third-party-advisory
- https://gist.github.com/TrebledJ/164c7ca6c8208b63e6937bc11984720bexploit
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.