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CVE-2026-13512— Databend Tenant client_session_manager.rs state_key authorization

Quick assessment

Affected
n/a Databend
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Databend Labs Databend是Databend Labs组织的一款云原生数据仓库软件。 Databend Labs Databend 1.2.881及之前版本存在授权问题漏洞，该漏洞源于Tenant Handler组件中文件src/query/service/src/servers/http/v1/session/client_session_manager.rs的函数ClientSessionManager::state_key操作导致授权绕过。

CVSS 6.3 · Medium EPSS 0.38% · P30

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
n/a Databend 1.2.881 affected
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I. Basic Information for CVE-2026-13512

Vulnerability Information
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Vulnerability Title
Databend Tenant client_session_manager.rs state_key authorization
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Databend Labs Databend 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Databend Labs Databend是Databend Labs组织的一款云原生数据仓库软件。 Databend Labs Databend 1.2.881及之前版本存在授权问题漏洞，该漏洞源于Tenant Handler组件中文件src/query/service/src/servers/http/v1/session/client_session_manager.rs的函数ClientSessionManager::state_key操作导致授权绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- Databend 1.2.881 cpe:2.3:a:databend:databend:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-13512

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III. Intelligence Information for CVE-2026-13512

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Patches & Fixes for CVE-2026-13512 (2)

Same Patch Batch · n/a · 2026-06-28 · 4 CVEs total

CVE-2026-13509 6.3 MEDIUM RAGapp Knowledge File files.py FileHandler.remove_file path traversal
CVE-2026-13484 5.0 MEDIUM MLflow Experiment-scoped Label Schema CRUD API authorization
CVE-2026-13511 3.1 LOW VoltAgent Memory REST API memory.handlers.ts handleGetMemoryConversation improper authoriz

IV. Related Vulnerabilities

Same vendor: n/a
Same weakness: CWE-639

V. Comments for CVE-2026-13512

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