CVE-2026-49845 Apache Software Foundation CVE debrief

Who should care

Defenders of Apache Hive deployments, operators, platform administrators, vulnerability management teams, and security teams should assess exposure and prioritize upgrading to version 4.2.1 or later. They should also review compensating controls for exposed systems while remediation is scheduled and verified, and check relevant monitoring, detection, and logs for exposed assets that need extra review.

Why it matters

CVE-2026-49845 is a SQL injection issue in Apache Hive that allows authenticated users to read, modify, or affect partition metadata. Defenders should prioritize upgrading to version 4.2.1 or later.

• Read, modify, or affect unintended partition metadata
• Statistics updates, truncation targets, and file-metadata cache operations may be affected
• Authenticated users with access to Hive Metastore APIs can perform this attack
• Upgrade to version 4.2.1 or later to fix the issue

Technical summary

The SQL injection issue in Apache Hive allows authenticated users with access to Hive Metastore APIs to read, modify, or affect unintended partition metadata. The issue is caused by client-supplied partition names being embedded into SQL using string concatenation instead of bind parameters. This can affect reads, stats updates, truncate targets, metadata-cache targets, and related operations when metastore.try.direct.sql is enabled. The issue is fixed in version 4.2.1. Users are recommended to upgrade to version 4.2.1 or later to fix the issue.

Defensive priority

Upgrade to version 4.2.1 or later to fix the SQL injection issue in Apache Hive.

Recommended defensive actions

• Upgrade to version 4.2.1 or later
• Restrict access to Hive Metastore APIs
• Monitor for suspicious activity
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details about the SQL injection issue in Apache Hive. The issue allows authenticated users with access to Hive Metastore APIs to read, modify, or affect unintended partition metadata.

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.