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CVE-2026-9520— blitz-js blitz Sign-in LoginForm.tsx cross site scripting

CVSS 4.3 · Medium EPSS 0.03% · P9

Affected Version Matrix 3

VendorProductVersion RangeStatus
blitz-jsblitz3.0.0affected
3.0.1affected
3.0.2affected
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I. Basic Information for CVE-2026-9520

Vulnerability Information
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Vulnerability Title
blitz-js blitz Sign-in LoginForm.tsx cross site scripting
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
blitz-jsblitz 3.0.0 cpe:2.3:a:blitz-js:blitz:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9520

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III. Intelligence Information for CVE-2026-9520

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News Coverage for CVE-2026-9520 (1)

IV. Related Vulnerabilities

Same vendor: blitz-js
Same weakness: CWE-79

V. Comments for CVE-2026-9520

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