CVE-2026-9520
blitz-js blitz Sign-in LoginForm.tsx cross site scripting
- State
- Published
- Severity
- 5.3 Medium
- Published
- May 26, 2026
- Updated
- May 27, 2026
- Reserved
- May 25, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 4.3 Medium | 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 | VulDB |
| 3.0 | 4.3 Medium | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R | VulDB |
| 2.0 | 5.0 Medium | AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
blitzblitz-js |
|
References
- VDB-365540 | blitz-js blitz Sign-in LoginForm.tsx cross site scriptingvdb-entrytechnical-description
- VDB-365540 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- Submit #814378 | BlitzJS Blitz 3.0.2 DOM-Based XSS, Open Redirectthird-party-advisory
- https://gist.github.com/TrebledJ/164c7ca6c8208b63e6937bc11984720bexploit
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