description: "CVE-2026-52833 is a High (8.0) vulnerability: Nuclio is a 'Serverless' framework for Real-Time Events and Data Processing.. This entry ships a detection-only PoC and a Docker te..." keywords: "CVE-2026-52833, CVE-2026-52833 detection, CVE-2026-52833 poc, Nuclio is a "Serverless" framework for Real-Time Events and Data Processing."
CVE-2026-52833 — Nuclio is a "Serverless" framework for Real-Time Events and Data Processing.¶
Key facts
CVE-2026-52833 is a High (8.0) vulnerability: Nuclio is a "Serverless" framework for Real-Time Events and Data Processing.. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-52833 |
| Severity | High (8.0) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-52833/ |
Details¶
English | 한국어
Description¶
Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. Prior to version 1.16.5, Nuclio's Java runtime generates a build.gradle file during function builds using Go's text/template package. The template renders runtimeAttributes.repositories[] values with the {{ . }} action, which performs no escaping. An attacker can embed a closing brace (}) to break out of the repositories {} block and append arbitrary Groovy statements that execute unconditionally during the Gradle configuration phase. This issue has been patched in version 1.16.5.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-52833 |
| Type | RCE |
| CVSS Score | 8.0 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-52833/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-2026-52833
# 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://github.com/nuclio/nuclio/commit/4c78040c759068e927f3ed7c6507543c15d4ae56
- https://github.com/nuclio/nuclio/pull/4149
- https://github.com/nuclio/nuclio/releases/tag/1.16.5
- https://github.com/nuclio/nuclio/security/advisories/GHSA-3v79-m2cg-89ww
- https://github.com/nuclio/nuclio/security/advisories/GHSA-3v79-m2cg-89ww
Generated by PoC Generator on 2026-09-03T07:58:35.214668273
Frequently asked questions¶
What is CVE-2026-52833?¶
CVE-2026-52833 is a High (8.0) vulnerability: Nuclio is a "Serverless" framework for Real-Time Events and Data Processing.. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-52833?¶
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-2026-52833?¶
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.