CVE-2026-59827 metabase CVE debrief

Who should care

Users of Metabase with H2 database connections, especially those with authenticated users who can run native H2 queries, should apply the patches immediately to prevent potential code execution. This includes administrators, security teams, and operators who manage Metabase instances and ensure the security of the systems and data they handle.

Technical summary

The vulnerability allows an authenticated user to execute code on the Metabase server by deserializing arbitrary Java objects from H2 native query results without validation. This affects Metabase instances connected to H2 databases, including the default sample database. The issue is addressed in Metabase versions 1.58.15, 1.59.12, 1.60.6.3, and 1.61.1.4. Technical details indicate that the vulnerability is due to insecure deserialization of Java objects in H2 native query result columns of type OTHER. This can be mitigated by applying patches, restricting access to native H2 queries, and monitoring for suspicious activity.

Defensive priority

High

Recommended defensive actions

• Apply patches to Metabase instances: upgrade to versions 1.58.15, 1.59.12, 1.60.6.3, or 1.61.1.4
• Restrict access to native H2 queries for authenticated users
• Monitor for suspicious activity related to H2 queries
• Review system logs for exposed assets that need extra review
• Track exceptions and retest remediated assets
• Close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD detail provide information on the vulnerability and patches. Metabase has released fixed versions and advisories. Evidence limits suggest that further verification is needed to confirm affected scope and severity. Defenders should review the official advisory and CVE record to validate affected systems and apply patches accordingly. Additional verification tasks include reviewing system logs for suspicious activity related to H2 queries and ensuring that access to native H2 queries is restricted for authenticated users.

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.