CVE-2026-87035 in Comply
Summary
by MITRE • 09/09/2026
Tanium addressed an information disclosure vulnerability in Comply.
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Analysis
by VulDB Data Team • 09/09/2026
The disclosed vulnerability represents a critical flaw within the Tanium Comply module, specifically categorized as an unauthorized access to sensitive data through improper restriction of information flow. This type of security defect is formally aligned with Common Weakness Enumeration identifier CWE-200, which defines Information Exposure, and more precisely CWE-538 if it involves insertion of sensitive information into log files or other artifacts that are accessible by unintended actors. In the context of enterprise endpoint management platforms like Tanium, such vulnerabilities pose a severe risk because they can expose configuration details, user credentials, internal network topology, or compliance status data to attackers who may have achieved lower-level access on an affected system. The operational impact extends beyond simple data leakage; it facilitates further reconnaissance activities by adversaries seeking to map the environment for more targeted attacks.
From a tactical perspective, this vulnerability aligns with several techniques within the MITRE ATT&CK framework. It directly supports T1087, Account Discovery, and potentially T1539, Steal Web Session Cookie, depending on how the information is exposed. If the flaw allows an attacker to retrieve session tokens or authentication headers through manipulated requests, it enables credential theft without needing to crack passwords. Furthermore, exposure of internal system configurations can aid in T1082, System Information Discovery, allowing attackers to identify software versions and patch levels that may be exploitable using known public exploits. The presence of such a flaw undermines the core value proposition of Tanium Comply, which is to provide accurate and secure compliance reporting across an organization's infrastructure.
The technical nature of this information disclosure likely stems from insufficient access control checks on specific API endpoints or web interface routes within the Comply application logic. Attackers could potentially exploit this by crafting malicious HTTP requests that bypass standard authentication or authorization mechanisms, thereby retrieving data intended only for privileged administrators or specific compliance roles. This misconfiguration allows low-privilege users or external attackers to view sensitive information such as user lists, group memberships, policy definitions, and historical audit logs. The lack of proper input validation or output encoding in these response paths means that even if initial access is limited, the scope of damage can be significantly amplified through data aggregation from multiple sources within the platform.
Mitigation strategies must focus on immediate remediation via vendor patches combined with robust defensive monitoring. Organizations running Tanium Comply should apply the latest security updates provided by Tanium to close the specific code path responsible for the disclosure. In addition to patching, it is crucial to implement network segmentation and strict firewall rules that restrict access to management interfaces from untrusted networks. Security teams should also enable enhanced logging on web application firewalls and endpoint detection systems to monitor for anomalous request patterns indicative of enumeration or data scraping attempts. Regular audits of user permissions within the Tanium console are necessary to ensure the principle of least privilege is strictly enforced, minimizing the blast radius if an account is compromised. Continuous monitoring using SIEM solutions configured with rules based on ATT&CK techniques related to discovery and collection will help detect exploitation attempts in real time before significant data exfiltration occurs.