CVE-2026-105707 in uptrace
Summary
by MITRE • 10/06/2026
A security vulnerability has been detected in uptrace up to 2.1.0-beta.8. Affected by this vulnerability is the function Login of the file pkg/org/user_handler.go. The manipulation leads to information exposure through error message. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified in Uptrace versions up to 2.1.0-beta.8 represents a significant information disclosure risk within the application's authentication subsystem. Specifically, the flaw resides in the Login function located in the pkg/org/user_handler.go file. This component is responsible for processing user credentials and managing session initialization during the login process. The core technical issue stems from improper error handling practices where the application returns detailed internal error messages to the client upon failed authentication attempts or other operational failures. Instead of returning a generic, non-descriptive failure message such as Authentication Failed, the system exposes specific details about why the operation did not succeed. This behavior allows remote attackers to gather sensitive information regarding the internal state of the application and its data structures without requiring any prior authentication privileges.
From a technical perspective, this vulnerability aligns with CWE-209, which classifies issues related to the generation of error messages that contain sensitive information. By leaking specific details about user existence or system configuration through these verbose responses, attackers can perform reconnaissance activities more effectively. For instance, if an error message distinguishes between invalid usernames and incorrect passwords, it enables username enumeration attacks. This reduces the complexity of brute-force campaigns by allowing adversaries to filter out non-existent accounts before attempting password cracking. Furthermore, detailed stack traces or internal path disclosures embedded in these errors could reveal version-specific implementation details that might be leveraged alongside other known exploits targeting specific software versions.
The operational impact of this vulnerability is primarily centered around information exposure and the facilitation of further attacks. Since the exploit can be initiated remotely over a network connection, an unauthenticated attacker can probe the login endpoint repeatedly to map out valid user accounts or identify configuration weaknesses. This reconnaissance phase significantly lowers the barrier for subsequent malicious activities such as credential stuffing, brute-force password guessing, or targeted social engineering campaigns against identified users. The fact that the exploit has been disclosed publicly increases the likelihood of automated scanning and exploitation by threat actors who monitor vulnerability databases and public repositories for actionable intelligence.
Although the project maintainers were notified early through an issue report, the lack of a response indicates a potential gap in their security triage process or resource allocation for patching critical vulnerabilities. Until a fix is released, organizations relying on Uptrace must implement compensating controls to mitigate this risk. Recommended mitigations include configuring web application firewalls to intercept and sanitize error responses before they reach the client, ensuring that only generic HTTP status codes like 401 Unauthorized are returned without additional body content detailing the failure reason. Additionally, developers should review all error handling paths in the authentication module to ensure consistency with secure coding standards that prioritize minimal information leakage. Updating to a patched version as soon as it becomes available remains the most effective long-term solution to eliminate this attack vector entirely.