Apache HBase up to 2.5.14/2.6.5/3.0.0 Thrift/Rest Delegation Service improper authorization

Summaryinfo

A vulnerability classified as critical has been found in Apache HBase up to 2.5.14/2.6.5/3.0.0. The affected element is an unknown function of the component Thrift/Rest Delegation Service. This manipulation causes improper authorization. This vulnerability is tracked as CVE-2026-49326. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Apache HBase up to 2.5.14/2.6.5/3.0.0 and classified as critical. Affected by this vulnerability is some unknown processing of the component Thrift/Rest Delegation Service. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at lists.apache.org. This vulnerability is known as CVE-2026-49326 since 05/29/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/24/2026). The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 2.5.15, 2.6.6 or 3.0.0-beta-2 eliminates this vulnerability.

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Productinfo

Vendor

• Apache

Name

• HBase

Version

• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6
• 2.5.7
• 2.5.8
• 2.5.9
• 2.5.10
• 2.5.11
• 2.5.12
• 2.5.13
• 2.5.14
• 2.6.0
• 2.6.1
• 2.6.2
• 2.6.3
• 2.6.4
• 2.6.5
• 3.0

License

• open-source

Website

• Vendor: https://www.apache.org/

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