CVE-2025-31650 PoC — Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame

Source

https://github.com/sattarbug/Analysis-of-TomcatKiller---CVE-2025-31650-Exploit-Tool

Associated Vulnerability

Title: Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame (CVE-2025-31650)
Description:Improper Input Validation vulnerability in Apache Tomcat. Incorrect error handling for some invalid HTTP priority headers resulted in incomplete clean-up of the failed request which created a memory leak. A large number of such requests could trigger an OutOfMemoryException resulting in a denial of service. This issue affects Apache Tomcat: from 9.0.76 through 9.0.102, from 10.1.10 through 10.1.39, from 11.0.0-M2 through 11.0.5. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.90 though 8.5.100. Users are recommended to upgrade to version 9.0.104, 10.1.40 or 11.0.6 which fix the issue.

Readme

# Tomcat Vulnerability Scanner

A tool to detect CVE-2025-31650 in Apache Tomcat servers using Shodan integration.

## Features
- HTTP/2 priority vulnerability detection
- Shodan target discovery
- CSV/JSON reporting

## Installation
```bash
python -m venv venv
source venv/bin/activate
pip install -r requirements.txt

File Snapshot

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