CVE-2026-0239 in Chronosphere Chronocollector
Summary
by MITRE • 05/13/2026
An information disclosure vulnerability in the Chronosphere Chronocollector enables an unauthenticated attacker with network access to the collector service to retrieve sensitive information.
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Analysis
by VulDB Data Team • 05/13/2026
The information disclosure vulnerability in Chronosphere Chronocollector represents a critical security weakness that undermines the integrity of sensitive data handling within monitoring and observability platforms. This vulnerability specifically affects the chronocollector component which serves as a crucial data collection point for monitoring systems. The flaw allows unauthenticated attackers who can establish network connectivity to the collector service to extract sensitive information that should remain protected within the system. Such vulnerabilities are particularly dangerous in enterprise environments where monitoring systems often contain sensitive operational data, system configurations, and performance metrics that could be leveraged by malicious actors for further exploitation.
The technical nature of this vulnerability stems from inadequate authentication mechanisms within the chronocollector service, creating an attack surface where unauthorized parties can access protected data through network-based interactions. This type of flaw typically occurs when the service fails to properly validate incoming requests or implement appropriate access controls for sensitive endpoints. The vulnerability's classification aligns with CWE-200, which addresses information exposure, and represents a fundamental breakdown in the principle of least privilege that should govern all system components. Attackers can exploit this weakness by simply connecting to the collector service without requiring valid credentials, making the attack vector particularly accessible and dangerous.
The operational impact of this vulnerability extends beyond simple data exposure, as the sensitive information potentially accessible through the chronocollector could include system configurations, user data, performance metrics, and operational details that provide attackers with valuable intelligence for targeting other system components. This information disclosure could enable attackers to map the target environment, identify vulnerable services, and develop more sophisticated attack strategies. The implications are particularly severe in cloud environments where chronocollector services may be exposed to broader network access, potentially allowing attackers to gather intelligence across multiple monitored systems. Organizations relying on chronosphere for infrastructure monitoring face significant risk of operational disruption and potential compliance violations if this vulnerability is exploited.
Mitigation strategies for this vulnerability should focus on implementing robust authentication mechanisms, network segmentation, and access control policies for the chronocollector service. Organizations should ensure that the collector service operates within protected network zones with appropriate firewall rules limiting access to authorized systems only. The implementation of strong authentication protocols, including mutual TLS authentication, would prevent unauthorized access to sensitive data. Additionally, regular security assessments and network monitoring should be conducted to detect potential exploitation attempts. From an ATT&CK framework perspective, this vulnerability maps to T1005 - Data from Local System and T1041 - Exfiltration Over C2 Channel, indicating that attackers could use this weakness to gather system information and potentially establish persistent access through the collected data. Organizations should also consider implementing network-based intrusion detection systems to monitor for unauthorized access attempts to monitoring services.