---
id: CVE-2026-13512
title: A vulnerability was identified in Databend up to 1.2.881 on HTTP
summary: >-
  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 Handl…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-285
  - CWE-639
published: '2026-06-28'
updated: '2026-06-28'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-13512'
references:
  - url: 'https://github.com/databendlabs/databend/issues/19930'
    label: cna@vuldb.com
  - url: 'https://github.com/databendlabs/databend/pull/19931'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-13512'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/838874'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/374520'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/374520/cti'
    label: cna@vuldb.com
tags:
  - nvd
ingestedAt: '2026-06-29T13:42:12.279Z'
epss: 0.00384
epssPercentile: 0.29708
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.