CVE-2026-76281 in Splunk
Summary
by MITRE • 10/07/2026
Improper Access Control. Splunk addressed multiple internally identified vulnerabilities in Splunk Enterprise versions 10.4.3, 10.2.7, 10.0.10, and 9.4.15. The vulnerabilities are grouped by Common Weakness Enumeration (CWE), with one Common Vulnerabilities and Exposures (CVE) identifier assigned to each group. See Details for more information.
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Analysis
by VulDB Data Team • 10/07/2026
Splunk Enterprise versions 10.4.3, 10.2.7, 10.0.10, and 9.4.15 addressed a cluster of internally identified vulnerabilities categorized under the umbrella of improper access control. These flaws represent significant security gaps within the application's authentication and authorization mechanisms, allowing unauthorized entities to perform actions or access data that they should not be permitted to handle according to defined role-based policies. The remediation effort consolidated multiple distinct technical issues into specific Common Vulnerabilities and Exposures identifiers based on their underlying Common Weakness Enumeration classifications, ensuring a structured approach to patching these critical security defects across the supported software versions.
The core of these vulnerabilities lies in the failure of Splunk Enterprise to properly enforce restrictions on authenticated users regarding what resources they can access or modify. In many instances, this manifests as an inability to distinguish between different privilege levels effectively, leading to situations where a user with limited permissions might inadvertently or maliciously escalate their privileges to gain administrative control over the system. This type of flaw is typically associated with CWE-269, which describes Improper Privilege Management, and often intersects with CWE-862, Missing Authorization checks. When such controls are absent or flawed, an attacker who has obtained valid credentials for a low-level account can exploit these gaps to bypass intended security boundaries, potentially accessing sensitive configuration files, modifying system settings, or executing commands that compromise the integrity of the entire Splunk deployment.
The operational impact of these improper access control vulnerabilities is severe, particularly in enterprise environments where Splunk serves as a central hub for log aggregation and security information management. If an attacker successfully exploits one of these flaws, they could gain unauthorized read access to sensitive logs containing personally identifiable information or proprietary business data, leading to significant privacy violations and regulatory non-compliance with standards such as GDPR or HIPAA. Furthermore, the ability to modify system configurations or execute arbitrary commands can result in a complete compromise of the underlying infrastructure. This may facilitate further lateral movement within the network, allowing attackers to pivot from the Splunk server to other critical systems, thereby escalating the scope of the breach and increasing the potential for data exfiltration or service disruption.
To mitigate these risks, organizations running affected versions must immediately upgrade to the patched releases specified by Splunk, which include version 10.4.3, 10.2.7, 10.0.10, and 9.4.15. It is crucial to verify that all instances of Splunk Enterprise within the environment are updated consistently to prevent any single unpatched node from serving as an entry point for attackers. In addition to applying patches, administrators should review their role-based access control configurations to ensure they adhere to the principle of least privilege, granting users only the permissions strictly necessary for their job functions. Regular audits of user activity and permission assignments can help detect anomalies that might indicate exploitation attempts or misconfigurations. Monitoring tools should be configured to alert on unusual administrative actions or unauthorized access patterns, providing an additional layer of defense against potential abuse of these previously vulnerable pathways.