CVE-2026-78584 Elastic CVE debrief

Who should care

Elastic Kibana administrators, security teams, and users with Osquery live-query privileges should be aware of this vulnerability and take necessary defensive actions. Affected operators and platforms should review and adjust access controls for Kibana spaces. Vulnerability management and security teams should prioritize patching and monitoring for suspicious query activity. Asset inventory and configuration reviews are also recommended to ensure proper mitigation of this vulnerability in Kibana deployments. Users with Osquery live-query privileges should verify their access controls and be cautious when querying across Kibana spaces they are not authorized to access. Security teams should also consider compensating controls for exposed systems while remediation is scheduled and verified. Monitoring and detection capabilities should be reviewed to ensure proper coverage of potential exploitation attempts. Additionally, incident response plans should be updated to address potential information disclosure via Query System for Information (CAPEC-54). Rollback and change window procedures should be evaluated to minimize potential downtime during remediation. Source tracking and logging mechanisms should be implemented to detect and respond to potential exploitation attempts. These actions will help ensure that Kibana deployments are properly secured against this vulnerability and minimize potential impact in the event of exploitation. Review of vendor advisories and CVE records is recommended for further details on affected versions and mitigation strategies. Security teams should also consider implementing asset inventory and configuration reviews to ensure proper mitigation of this vulnerability in Kibana deployments. Compensating controls, such as restricting Osquery live-query privileges and monitoring query activity, should be evaluated and implemented as needed. By taking these actions, organizations can help protect their Kibana deployments from potential exploitation of this vulnerability and minimize the risk of information disclosure via Query System for Information (CAPEC-54). Monitoring and detection capabilities should be reviewed to ensure proper and 7

Technical summary

The Kibana Osquery feature is vulnerable to an Observable Response Discrepancy (CWE-204), which can be exploited for information disclosure via Query System for Information (CAPEC-54). An authenticated user with Osquery live-query privileges can determine whether a scheduled query identifier exists in a Kibana space they are not authorized to access. This vulnerability affects Kibana administrators, security teams, and users with Osquery live-query privileges.

Defensive priority

Medium-priority defensive actions are recommended due to the potential for information disclosure.

Recommended defensive actions

• Inventory and verify Kibana Osquery feature usage and privileges.
• Restrict Osquery live-query privileges to authorized users.
• Monitor for suspicious query activity.
• Apply vendor patches or updates.
• Review and adjust access controls for Kibana spaces.

Evidence notes

Evidence from the NVD and Elastic indicates an Observable Response Discrepancy in Kibana's Osquery feature, potentially leading to information disclosure. The CVE record and vendor advisory provide details. Further review of Kibana's Osquery feature usage and privileges is recommended. Defensive verification tasks should focus on monitoring query activity and access controls for Kibana spaces.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.