CVE-2026-100619 — Capgo (capgo.app) blocks direct user inserts into the public.manifest table with a…¶

Key facts

CVE-2026-100619 is a High (8.8) vulnerability: Capgo (capgo.app) blocks direct user inserts into the public.manifest table with a…. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-100619
Severity	High (8.8)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-100619/

Details¶

English | 한국어

Description¶

Capgo (capgo.app) blocks direct user inserts into the public.manifest table with a RESTRICTIVE row-level security policy, but that restriction can be bypassed indirectly. A principal holding an app-scoped upload/write/all API key (upload+ rights) or an authenticated user with write+ rights on an app can update public.app_versions.manifest on a version whose storage_provider is 'r2-direct', which is not covered by the bundle content-lock check. The on_version_update async worker trusts record.manifest and, using the service-role Supabase client, inserts the attacker-controlled file_name, file_hash, and s3_path into public.manifest before clearing app_versions.manifest. When a channel points to the crafted version, the /updates endpoint returns the service-role-created manifest entry as a client-facing download_url, enabling OTA manifest poisoning through a trusted async worker path. All versions are affected; no patch was available at the time of publication.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-100619
CVSS Score	8.8

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-100619/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-2026-100619

# 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/Cap-go/capgo.app/security/advisories/GHSA-443r-w5p8-rhr2
https://www.vulncheck.com/advisories/capgo-ota-manifest-poisoning-via-app-versions-manifest-bypass

Generated by PoC Generator on 2026-09-27T05:18:48.454733512

Frequently asked questions¶

What is CVE-2026-100619?¶

CVE-2026-100619 is a High (8.8) vulnerability: Capgo (capgo.app) blocks direct user inserts into the public.manifest table with a…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-100619?¶

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-2026-100619?¶

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.