CVE-2026-93684 Apache Software Foundation CVE debrief

Who should care

Apache Impala administrators and users with SELECT permission should be aware of this vulnerability and take necessary precautions to prevent exploitation. This includes verifying Impala versions, monitoring for suspicious activity, and implementing compensating controls for exposed systems. Additionally, security teams and vulnerability management teams should review the vulnerability and implement necessary security measures to mitigate the risk.

Why it matters

Apache Impala users should assess exposure to stored XSS via query plans. Defenders must verify Impala version and upgrade to 4.5.3 if running 4.5.2 or earlier. Monitoring and inventory checks are necessary to prevent exploitation.

• Defenders must verify and upgrade Impala versions to prevent exploitation
• Users with SELECT permission can inject malicious JavaScript
• XSS can be executed in another user's browser when viewing query plans

Technical summary

Apache Impala versions up to and including 4.5.2 have a stored XSS vulnerability in query plans. An SQL user with only SELECT permission can inject JavaScript into a table alias, which can be executed in another user's browser when viewing the query plan in Impala's Web UI. This vulnerability can be exploited by an attacker with malicious intent, potentially leading to unauthorized access or modification of sensitive data. To mitigate this risk, defenders should prioritize upgrading to version 4.5.3 and implement additional security measures.

Defensive priority

Upgrade to version 4.5.3; verify Impala versions; monitor for suspicious activity

Recommended defensive actions

• Upgrade Apache Impala to version 4.5.3
• Verify Impala versions in use
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and 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 source item provide details on the stored XSS vulnerability in Apache Impala query plans. The NVD entry is currently not provided. Evidence is limited to CVE Program and source-item details. Defenders should verify Impala versions and query plan exposure to assess potential impact. This includes reviewing system logs for suspicious activity and ensuring that all necessary security patches are applied.

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.