CVE-2026-13512 PUBLISHED

A vulnerability was identified in Databend up to 1.2.881 on HTTP. This affects the function ClientSessionManager::state_key of the file src/query/service/src/servers/http/v1/session/client_session_manager.rs of the component Tenant Handler. The manipulation leads to authorization bypass. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The pull request to fix this issue awaits acceptance.

• Dem000000 (VulDB User) reporter
• VulDB CNA Team coordinator

• VDB-374520 | Databend Tenant client_session_manager.rs state_key authorization
• VDB-374520 | CTI Indicators (IOB, IOC, IOA)
• CVE-2026-13512 | CVE Analysis and Report
• Submit #838874 | Databend Labs Databend main branch commit 21377cd76bb1e84f92bfc9da1acc881b8841f1de; affected versions unknown CWE-639 Authorization Bypass Through User-Controlled Key
• https://github.com/databendlabs/databend/issues/19930
• https://github.com/databendlabs/databend/pull/19931

• Authorization Bypass CWE
• Improper Authorization CWE