Skip to content

CVE-2016-1646 — The Array.prototype.concat implementation in builtins.cc in Google V8, as used in Google…

Key facts

CVE-2016-1646 is a High (8.8) vulnerability: The Array.prototype.concat implementation in builtins.cc in Google V8, as used in Google…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-06-08), confirming active exploitation in the wild.

Actively exploited — on the CISA KEV catalog

CVE-2016-1646 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-06-08), confirming exploitation in the wild. Federal remediation deadline: 2022-06-22. Prioritise patching and deploy the detection and prevention rules below.
CVE CVE-2016-1646
Severity High (8.8)
CISA KEV Actively exploited (added 2022-06-08)
Detection / prevention —
PoC poc.py
Source 2016/CVE-2016-1646/

Details

English | 한국어

Description

The Array.prototype.concat implementation in builtins.cc in Google V8, as used in Google Chrome before 49.0.2623.108, does not properly consider element data types, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via crafted JavaScript code.

Vulnerability Details

Property Value
CVE ID CVE-2016-1646
CVSS Score 8.8

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2016/CVE-2016-1646/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-2016-1646

# 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

  • http://googlechromereleases.blogspot.com/2016/03/stable-channel-update_24.html
  • http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00000.html
  • http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00001.html
  • http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00039.html
  • http://rhn.redhat.com/errata/RHSA-2016-0525.html
  • http://www.debian.org/security/2016/dsa-3531
  • http://www.securitytracker.com/id/1035423
  • http://www.ubuntu.com/usn/USN-2955-1
  • https://code.google.com/p/chromium/issues/detail?id=594574
  • https://codereview.chromium.org/1804963002/
  • https://security.gentoo.org/glsa/201605-02
  • http://googlechromereleases.blogspot.com/2016/03/stable-channel-update_24.html
  • http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00000.html
  • http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00001.html
  • http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00039.html
  • http://rhn.redhat.com/errata/RHSA-2016-0525.html
  • http://www.debian.org/security/2016/dsa-3531
  • http://www.securitytracker.com/id/1035423
  • http://www.ubuntu.com/usn/USN-2955-1
  • https://code.google.com/p/chromium/issues/detail?id=594574
  • https://codereview.chromium.org/1804963002/
  • https://security.gentoo.org/glsa/201605-02
  • https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-1646

Generated by PoC Generator on 2026-07-11T05:36:51.932772778

Frequently asked questions

What is CVE-2016-1646?

CVE-2016-1646 is a High (8.8) vulnerability: The Array.prototype.concat implementation in builtins.cc in Google V8, as used in Google…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2022-06-08), confirming active exploitation in the wild.

How do I detect CVE-2016-1646?

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-2016-1646?

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

Is CVE-2016-1646 actively exploited?

Yes. CVE-2016-1646 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2022-06-08, which means it has been exploited in the wild. CISA set a federal remediation deadline of 2022-06-22. Prioritise patching and deploy the detection and prevention rules above.

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