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CVE-2026-77651 — The arrayref crate 0.3.10 for Rust can trigger execution of malicious code when compiling…

Key facts

CVE-2026-77651 is a Critical (9.8) vulnerability: The arrayref crate 0.3.10 for Rust can trigger execution of malicious code when compiling…. This entry ships a detection-only PoC and a Docker test lab.
CVE CVE-2026-77651
Severity Critical (9.8)
Detection / prevention —
PoC poc.py
Source 2026/CVE-2026-77651/

Details

English | 한국어

Description

The arrayref crate 0.3.10 for Rust can trigger execution of malicious code when compiling a project that uses the crate, because it has a rogue dependency that registers with a command-and-control server to offer arbitrary code execution.

Vulnerability Details

Property Value
CVE ID CVE-2026-77651
CVSS Score 9.8

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-77651/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-2026-77651

# 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://blog.rust-lang.org/2026/08/20/supply-chain-attack-on-arrayref
  • https://github.com/rustsec/advisory-db/issues/3161
  • https://rustsec.org/advisories/RUSTSEC-2026-0260.html
  • https://safedep.io/arrayref-proc-macro1-rust-build-time-malware/
  • https://www.stepsecurity.io/blog/arrayref-rust-crate-supply-chain-attack

Generated by PoC Generator on 2026-08-22T01:06:24.367780604

Frequently asked questions

What is CVE-2026-77651?

CVE-2026-77651 is a Critical (9.8) vulnerability: The arrayref crate 0.3.10 for Rust can trigger execution of malicious code when compiling…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-77651?

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-2026-77651?

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.