PT-2026-43177 · Blitz.Js · Blitz

Trebledj · Published 2026-05-26 · Updated 2026-05-26 · CVE-2026-9520

Mitre

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

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.

Exploit

Code Injection

XSS

Weakness Enumeration

CWE-94

CWE-79

Related Identifiers

CVE-2026-9520

Affected Products

Blitz

References · 4

• 🔥 https://gist.github.com/TrebledJ/164c7ca6c8208b63e6937bc11984720b · Exploit
• https://vuldb.com/submit/814378 · Note
• https://vuldb.com/vuln/365540/cti · Note
• https://vuldb.com/vuln/365540 · Note