CVE-2026-97720 — Incorrect implementation of JWT/OAuth authentication in Impala executors in Apache Impala…¶

Key facts

CVE-2026-97720 is a Critical (9.1) vulnerability: Incorrect implementation of JWT/OAuth authentication in Impala executors in Apache Impala…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-97720
Severity	Critical (9.1)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-97720/

Details¶

English | 한국어

Description¶

Incorrect implementation of JWT/OAuth authentication in Impala executors in Apache Impala versions up to and including 4.5.2 which allows attacked to access resources served by the executor's webserver when that webserver is configured to accept JWT/OAuth tokens. Bearer token (JWT) signatures are not validated resulting in the webserver accepting any valid JWT. Users are recommended to either disable JWT/OAuth auth for Impala executors or upgrade to version 4.5.3, which fixes this issue.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-97720
Type	RCE
CVSS Score	9.1

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-97720/poc.py

Usage¶

# Run PoC against target
python3 poc.py --target <TARGET_URL>

# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>

⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.

Test Lab¶

This repository includes a Docker-based test environment with both vulnerable and patched applications.

Quick Start¶

# Clone and navigate to CVE directory
cd CVE-2026-97720

# Start both applications
docker-compose up -d

# Run tests
./run-tests.sh    # Linux/Mac
./run-tests.ps1   # Windows PowerShell

Application Endpoints¶

Application	URL	Status
Vulnerable App	http://localhost:8080	Shows vulnerability
Patched App	http://localhost:8081	Demonstrates fix

Directory Structure¶

├── README.md           # English documentation
├── README_KO.md        # Korean documentation
├── poc.py              # PoC detection script
├── docker-compose.yml  # Container orchestration
├── run-tests.sh        # Linux/Mac test runner
├── run-tests.ps1       # Windows test runner
├── vulnerable-app/     # Vulnerable version
│   ├── app.py
│   ├── Dockerfile
│   └── requirements.txt
└── patched-app/        # Fixed version
    ├── app.py
    ├── Dockerfile
    └── requirements.txt

References¶

https://lists.apache.org/thread.html/q2qkrnko9hdv2mhqy6prm06f65n2g3h2
http://www.openwall.com/lists/oss-security/2026/10/07/22

Generated by PoC Generator on 2026-10-08T18:23:36.353276667

Frequently asked questions¶

What is CVE-2026-97720?¶

CVE-2026-97720 is a Critical (9.1) vulnerability: Incorrect implementation of JWT/OAuth authentication in Impala executors in Apache Impala…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-97720?¶

Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.

How do I block or mitigate CVE-2026-97720?¶

Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.

For authorized security testing and research only. See the full source and NVD record.