CVE-2026-58419 in Gitea
Summary
by MITRE • 07/04/2026
Notification API leaks private issue metadata after access revocation
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/04/2026
This vulnerability involves a critical information disclosure flaw in notification systems where private issue metadata continues to be exposed even after access permissions have been revoked. The technical implementation fails to properly invalidate cached or buffered notification data when access control changes occur, creating a window where unauthorized users can still receive sensitive information about issues they should no longer have access to. This represents a direct violation of the principle of least privilege and demonstrates a fundamental flaw in how the system handles permission transitions.
The underlying mechanism typically involves notification queues or caching systems that store issue metadata for delivery to multiple recipients. When access is revoked, the system should immediately purge or invalidate these cached entries but instead maintains them in memory or persistent storage, allowing subsequent notifications to reference and expose previously restricted information. This class of vulnerability commonly occurs in enterprise issue tracking systems, project management platforms, and security incident response tools where notifications are generated based on issue states and user permissions.
The operational impact extends beyond simple data exposure to encompass potential privilege escalation scenarios and compliance violations. An attacker who gains access to a notification system could potentially collect sensitive information about issues they should not be able to view, including detailed technical descriptions, affected systems, severity ratings, or associated personnel. This metadata often contains critical intelligence that could be exploited for further attacks, making the vulnerability particularly dangerous in environments where security operations rely heavily on issue tracking systems.
Security controls should implement immediate invalidation of cached notification data upon access revocation events, ensuring proper cache synchronization across all notification channels and maintaining strict separation between different permission levels. The system architecture must enforce real-time updates to notification queues and prevent stale data from being delivered to users whose access has been modified. This vulnerability is classified as a CWE-200 Information Exposure and aligns with ATT&CK technique T1566 Credential Access through information disclosure pathways that can be exploited by threat actors.
Mitigation strategies include implementing robust cache invalidation mechanisms, establishing proper access control boundaries for notification systems, and conducting regular audits of notification data flows. Organizations should also implement monitoring for unauthorized access patterns in notification systems and ensure that all permission changes trigger immediate refreshes of notification caches. The solution requires a comprehensive approach that addresses both the immediate technical flaw and establishes long-term controls to prevent similar issues in related components. Security teams must verify that notification APIs properly handle access revocation events and maintain consistent state management across all system components involved in issue tracking and communication processes.