CVE-2026-49326: Apache HBase: Missing scanner instance owner check in thrift delegation service
Missing Authorization vulnerability in Apache HBase thrift and rest delegation service.
A scan operation in thrift/rest service has 3 steps, open, fetch(possible multiple times), close. The open step will return an id which will be passed back to server for identifying the scanner instances stored at server side. We missed the owner check in fetch and close steps which means a user can fetch rows from the scanner which is opened by other users, and close scanners which belongs to other users.
This issue affects Apache HBase:from 3.0.0-alpha-1 through 3.0.0-beta-1, from 2.6.0 through 2.6.5, from 2.5.0 through 2.5.14, through 2.4..
Users are recommended to upgrade to version 3.0.0-beta-2, 2.6.6 and 2.5.15, which fixes the issue.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Apache HBaseto a version that resolves this vulnerability.Fixed in 3.0.0-beta-2 - Upgrade
Upgrade
Apache HBaseto a version that resolves this vulnerability.Fixed in 2.6.6 - Upgrade
Upgrade
Apache HBaseto a version that resolves this vulnerability.Fixed in 2.5.15
Event History
Frequently Asked Questions
What is the severity of CVE-2026-49326?
CVE-2026-49326 has a medium severity score of 6.5 based on the CVSS 3.1 metrics.
How do I fix CVE-2026-49326?
To mitigate CVE-2026-49326, it is recommended to implement proper authorization checks in the Apache HBase thrift and rest delegation service.
What impact does CVE-2026-49326 have on data security?
CVE-2026-49326 can lead to unauthorized access to scanner instances, potentially allowing sensitive data breaches.
Which software is affected by CVE-2026-49326?
CVE-2026-49326 affects Apache HBase, specifically its thrift and rest delegation service.
When was CVE-2026-49326 published?
CVE-2026-49326 was published on July 24, 2026.