Bug 2481321 (CVE-2026-9520)

Summary:	CVE-2026-9520 blitz: blitz-js blitz: Cross-site scripting via 'Next' argument manipulation
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in blitz-js blitz. A remote attacker can exploit this vulnerability by manipulating the 'Next' argument within the 'LoginForm.tsx' component. This manipulation leads to cross-site scripting (XSS), which allows the attacker to inject malicious scripts into web pages viewed by other users. The primary impact is information disclosure and potential unauthorized actions within the user's browser session.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Bug Depends On:	2481428
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Description OSIDB Bzimport 2026-05-26 03:01:26 UTC

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.