Exploit for CVE-2026-42530

## https://sploitus.com/exploit?id=B132E072-36D8-5390-949D-A06FA9ADC7B5
# CVE-2026-42530

Scanner for CVE-2026-42530, a use-after-free in nginx's HTTP/3 module.

Affected: nginx 1.31.0, 1.31.1  
Fixed: nginx 1.31.2

## Usage

```
pip install aioquic

python3 scanner_CVE-2026-42530.py  [port]
python3 scanner_CVE-2026-42530.py --file hosts.txt
```

## How it works

Opens two QPACK encoder streams on the same connection. Patched versions reject the second one with `0x103`. Vulnerable versions accept it, write into freed memory, and return `0x201`.

## Disclaimer

Only use on systems you own or have permission to test.

## Author

Valton Tahiri ([@v4ltonn](https://github.com/v4ltonn))