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Vendor nowo-tech
Package outbound-url-guard-bundle
Short Description Symfony bundle that blocks SSRF on outbound http(s) URLs: private networks, cloud metadata, and optional DNS pinning.
License MIT
Homepage https://github.com/nowo-tech/OutboundUrlGuard

Keywords symfony url webhook ssrf symfony-bundle outbound http-client

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Informations about the package outbound-url-guard-bundle

Outbound URL Guard

⭐ Found this useful? Install it from Packagist and star OutboundUrlGuard.

Symfony bundle that checks an outbound http or https URL before your app opens the connection. It blocks loopback, private, and reserved addresses, plus cloud metadata, and can pin a hostname to the first public DNS answer.

Compatible with Symfony 7.4, 8.0, and 8.1. PHP 8.2+ (Symfony 8.x requires PHP 8.4+).

This bundle is FrankenPHP worker mode friendly, including when reset_kernel is false (no per-request state; DNS bounded by dns_timeout). See FrankenPHP worker audit.

Features

Rejects schemes other than http and https.
Blocks loopback, RFC1918, link-local, unique-local, and other addresses PHP marks private or reserved.
Blocks cloud metadata even when allow_private is true, including decimal, octal, hex, shorthand (127.1-style), and IPv4-mapped forms. Hostnames resolving to metadata are blocked when resolve_dns is true.
Optional runtime private-URL switch: allow_private_resolver points at your AllowPrivateResolverInterface service, read on every RuntimeOutboundUrlGuard call.
Optional DNS resolution with an HttpClient resolve pin (IPv4 preferred) and a configurable socket timeout.
Does not open the HTTP connection. Callers still set TLS, timeouts, and max_redirects: 0.

Installation

Flex registers the bundle from type: symfony-bundle. See Installation.

Requirements

PHP >=8.2 <8.6
Symfony components ^7.4 || ^8.0 (symfony/config, symfony/dependency-injection, symfony/http-kernel, symfony/process, symfony/yaml)

Configuration

Full key list: Configuration.

Usage

Operator-controlled private URLs: implement AllowPrivateResolverInterface, set allow_private_resolver, inject RuntimeOutboundUrlGuard (same methods).

Docker service names: $guard->assertSafe('http://mercure/.well-known/mercure', resolveDns: false);

Documentation

Installation
Configuration
Usage
Contributing
Code of Conduct
Changelog
Upgrading
Release
Security
Engram
Spec-driven development
GitHub Spec Kit

Additional documentation

PSR evaluation
GitHub CI
FrankenPHP worker audit

Tests and coverage

PHPUnit unit and integration tests (composer test, make test)
PHP: 100%
TS/JS: N/A
Python: N/A

make test-coverage prints the PHP Lines percentage and fails when Clover statement coverage is below 99%. make test-coverage-100 requires 100%.

License

MIT. See LICENSE.

Contributing

See Code of Conduct.

Version policy

The 1.x line is supported. Report vulnerabilities privately as described in Security.

Author

Héctor Franco Aceituno and Nowo.tech.

All versions of outbound-url-guard-bundle with dependencies

PHP Build Version

Package Version

Version v1.5.0 Release 10. Nov 2026
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Requires php Version >=8.2 <8.6
symfony/config Version ^7.4 || ^8.0
symfony/dependency-injection Version ^7.4 || ^8.0
symfony/http-kernel Version ^7.4 || ^8.0
symfony/process Version ^7.4 || ^8.0
symfony/yaml Version ^7.4 || ^8.0

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