Is CVE-2026-9520 actively exploited?

No active exploitation of CVE-2026-9520 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-9520 be exploited remotely?

Yes. CVE-2026-9520 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-9520?

CVE-2026-9520 has a CVSS score of 4.3 (MEDIUM).

HOME VULNERABILITIESCVE-2026-9520

MEDIUM

CVE-2026-9520

CWE-79Published: May 26, 2026· Updated: May 26, 2026

4.3

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:9.1th

Official 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.

NVD Source

Technical Analysis

CVE-2026-9520 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.