CVE-2026-49969 in laravel-mediable
Summary
by MITRE • 07/13/2026
Laravel-Mediable before 7.0.0 contains a server-side request forgery vulnerability that allows remote attackers to issue arbitrary HTTP requests from the server by supplying unvalidated caller-controlled URLs to endpoints backed by MediaUploader::fromSource(). Attackers can craft URLs targeting RFC-1918 addresses, loopback interfaces, cloud metadata endpoints, or file:// URIs through RemoteUrlAdapter to reach internal infrastructure, retrieve sensitive files, and exfiltrate cloud credentials such as IAM tokens from instance metadata services.
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Analysis
by VulDB Data Team • 07/13/2026
This vulnerability resides in the Laravel-Mediable package prior to version 7.0.0 and represents a critical server-side request forgery flaw that enables remote attackers to execute arbitrary HTTP requests from the affected server. The vulnerability specifically targets the MediaUploader::fromSource() method which processes URLs provided by external callers without proper validation, creating an attack surface where malicious actors can manipulate the application's behavior through crafted URL inputs. The flaw stems from insufficient input sanitization and validation mechanisms that should have prevented untrusted URL sources from being processed directly by the media upload system.
The technical implementation of this vulnerability leverages the RemoteUrlAdapter component which handles URL processing for media files. Attackers can exploit this by constructing malicious URLs that target specific network addresses defined in RFC-1918 private address ranges, loopback interfaces such as 127.0.0.1, or cloud provider metadata endpoints like AWS's http://169.254.169.254 or Azure's http://169.254.169.254. These targets are particularly dangerous because they provide access to internal network resources and sensitive infrastructure components that should remain isolated from external networks. The vulnerability also supports file:// URI schemes which can be used to read local files on the server filesystem, potentially exposing configuration files, database credentials, or other sensitive data stored locally.
The operational impact of this vulnerability extends beyond simple data exfiltration as it provides attackers with comprehensive access to internal infrastructure components that are typically protected by network segmentation and firewall rules. When targeting cloud metadata endpoints, attackers can obtain temporary security credentials such as IAM tokens, service account keys, or instance profile information that grants them elevated privileges within the cloud environment. This access can enable lateral movement throughout the network, privilege escalation attacks, and potentially full compromise of the affected system. The vulnerability creates a persistent threat vector because once exploited, attackers can maintain access to internal resources without requiring additional authentication mechanisms.
Security practitioners should implement multiple layers of defense to mitigate this vulnerability effectively. The primary mitigation involves upgrading to Laravel-Mediable version 7.0.0 or later where proper URL validation and sanitization have been implemented. Additionally, network-level protections such as firewall rules that block outbound connections to RFC-1918 addresses, loopback interfaces, and cloud metadata endpoints should be enforced. Organizations must also implement strict input validation policies that reject URLs from untrusted sources and utilize allowlists for permitted domains or address ranges. The vulnerability aligns with CWE-918 Server-Side Request Forgery and maps to ATT&CK technique T1071.004 Application Layer Protocol: DNS, where attackers leverage application-level protocols to access internal resources that should remain protected from external access.
This vulnerability demonstrates the critical importance of validating all user-supplied inputs, particularly those used in network operations or file system interactions. The flaw represents a classic example of how insufficient input validation can create dangerous attack vectors that bypass traditional security controls. Organizations using Laravel applications with media upload capabilities must conduct thorough security assessments to identify similar vulnerabilities in their codebases and implement proper security controls including network segmentation, access controls, and monitoring systems that can detect anomalous outbound network requests. The vulnerability also highlights the need for comprehensive security testing that includes threat modeling exercises to identify potential server-side request forgery attack vectors within application frameworks and third-party libraries.