CVE-2026-5025 Overview
CVE-2026-5025 is a Missing Authorization vulnerability (CWE-862) affecting the /logs and /logs-stream endpoints in the log router component. These endpoints allow any authenticated user to read the full application log buffer without proper privilege verification. The endpoints only require basic authentication (get_current_active_user) but fail to implement any privilege checks such as is_superuser, enabling unauthorized access to sensitive log data.
Critical Impact
Any authenticated user can access complete application logs, potentially exposing sensitive information including credentials, API keys, internal system details, and user activity data that should be restricted to administrators.
Affected Products
- Log router component with /logs endpoint
- Log router component with /logs-stream endpoint
Discovery Timeline
- 2026-03-27 - CVE CVE-2026-5025 published to NVD
- 2026-03-30 - Last updated in NVD database
Technical Details for CVE-2026-5025
Vulnerability Analysis
This vulnerability represents a classic Broken Access Control flaw where authentication is implemented but authorization is missing. The affected endpoints correctly verify that a user is authenticated through the get_current_active_user mechanism, but fail to subsequently check whether that authenticated user has the necessary privileges to access application logs.
Application logs frequently contain sensitive information including internal IP addresses, database queries, authentication tokens, error messages that reveal system architecture, and potentially user-submitted data. When any authenticated user can access these logs, it creates a significant information disclosure risk that could facilitate further attacks or expose confidential data.
Root Cause
The root cause is the absence of privilege verification (such as is_superuser checks) on the /logs and /logs-stream endpoints. While the endpoints implement authentication to ensure requests come from valid users, they neglect to implement authorization checks that would restrict access to users with appropriate administrative privileges.
Attack Vector
An attacker with any valid user credentials can exploit this vulnerability remotely over the network. The attack requires no user interaction and can be executed with low complexity. The attacker simply needs to authenticate with valid credentials and then access the vulnerable endpoints to retrieve the full application log buffer. This could expose:
- Internal system configuration details
- Error messages revealing application architecture
- Potentially sensitive user data logged during operations
- Authentication tokens or session information
- Database query logs that could reveal data structures
Detection Methods for CVE-2026-5025
Indicators of Compromise
- Unusual access patterns to /logs or /logs-stream endpoints by non-administrative users
- High-frequency requests to log endpoints from single user accounts
- Access to log endpoints from user accounts that typically don't require log access
- Bulk data transfer patterns associated with log endpoint requests
Detection Strategies
- Implement audit logging for all access to /logs and /logs-stream endpoints with user identity tracking
- Monitor authentication logs for patterns of log endpoint access by non-privileged accounts
- Deploy web application firewall (WAF) rules to alert on log endpoint access patterns
- Review access control configurations for endpoints handling sensitive data
Monitoring Recommendations
- Enable detailed access logging for the affected endpoints including user identity, timestamp, and response size
- Set up alerts for log endpoint access by users without administrator roles
- Periodically audit which user accounts have accessed log endpoints
- Monitor for data exfiltration patterns following log endpoint access
How to Mitigate CVE-2026-5025
Immediate Actions Required
- Implement is_superuser or equivalent privilege checks on both /logs and /logs-stream endpoints immediately
- Review all similar endpoints in the application for missing authorization checks
- Audit access logs to determine if the vulnerability has been exploited
- Consider temporarily restricting access to log endpoints until proper authorization is implemented
Patch Information
Organizations should implement proper authorization checks on the affected endpoints. The fix requires adding privilege verification (such as is_superuser checks) to the /logs and /logs-stream endpoint handlers. Consult the Tenable Security Research Advisory for additional technical details and remediation guidance.
Workarounds
- Implement network-level access controls to restrict access to log endpoints to trusted IP addresses only
- Deploy a reverse proxy or WAF rule to block non-administrative users from accessing /logs and /logs-stream paths
- Temporarily disable the vulnerable endpoints if log streaming functionality is not critical to operations
- Implement application-layer authorization middleware to validate user privileges before granting access to sensitive endpoints
The vulnerability mechanism involves the log router accepting authenticated requests without verifying user privileges. Organizations should review the Tenable Security Research Advisory for detailed technical information and recommended remediation approaches.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
