CVE-2026-2376 in mirror-registry
Summary
by MITRE • 03/12/2026
A flaw was found in mirror-registry where an authenticated user can trick the system into accessing unintended internal or restricted systems by providing malicious web addresses.
When the application processes these addresses, it automatically follows redirects without verifying the final destination, allowing attackers to route requests to systems they should not have access to.
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Analysis
by VulDB Data Team • 06/03/2026
The vulnerability identified as CVE-2026-2376 resides within the mirror-registry application, representing a critical access control flaw that undermines the security boundaries of the system. This issue manifests when authenticated users exploit a redirect handling mechanism that fails to validate destination endpoints, creating an avenue for privilege escalation and unauthorized system access. The flaw operates at the intersection of authentication bypass and insecure redirect processing, fundamentally compromising the application's ability to enforce proper access controls. Such vulnerabilities are particularly dangerous in registry environments where sensitive data and system resources are typically protected by strict access policies.
The technical implementation of this vulnerability stems from insufficient input validation and redirect handling within the mirror-registry's web processing pipeline. When users submit web addresses for processing, the system automatically follows redirects without performing destination verification checks that should validate whether the final endpoint falls within acceptable access boundaries. This behavior aligns with CWE-601, which specifically addresses URL redirection vulnerabilities where applications redirect users to unvalidated destinations. The flaw essentially creates a trust relationship between the application and external systems without proper verification, allowing attackers to manipulate the redirect chain to access restricted internal resources that should only be reachable through legitimate administrative channels.
The operational impact of this vulnerability extends beyond simple unauthorized access, potentially enabling attackers to escalate privileges and gain access to sensitive system components, internal databases, or administrative interfaces that are not intended for public or even authenticated user access. This type of vulnerability directly relates to the ATT&CK technique T1078.004 which covers valid accounts with compromised credentials, as the attack leverages legitimate authenticated sessions to access resources outside the normal scope of user permissions. The consequences can include data exfiltration, system compromise, and potential lateral movement within the network infrastructure, particularly if the mirror-registry serves as a gateway to other internal systems or if the vulnerable application has elevated privileges.
Mitigation strategies for CVE-2026-2376 should focus on implementing strict destination validation for all redirect operations within the mirror-registry application. Organizations must ensure that redirect processing includes comprehensive destination verification that checks against a predefined whitelist of approved endpoints or employs strict hostname validation to prevent redirection to unauthorized systems. The solution should incorporate proper input sanitization and validation mechanisms that prevent attackers from crafting malicious URLs that could trigger unintended redirects. Additionally, implementing network-level controls and firewall rules that restrict outbound connections from the mirror-registry application can provide defense-in-depth protection. Regular security assessments and code reviews should specifically target redirect handling logic to identify similar vulnerabilities, while monitoring systems should be configured to detect unusual redirect patterns that might indicate exploitation attempts. The fix must also consider implementing proper logging and alerting mechanisms to track redirect operations and identify potential abuse attempts that could compromise system integrity.