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CVE-2026-71862— Checkmate: Sensitive Bearer Token Exposure via Public Status Pages When showURL Setting is Enabled

Quick assessment

Affected
bluewave-labs Checkmate
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

BlueWave Labs Checkmate是BlueWave Labs组织的一款监控与运维管理工具。 BlueWave Labs Checkmate 3.3.0版本至3.9.2之前版本存在安全漏洞，该漏洞源于启用全局showURL设置导致未经身份验证的GET /api/v1/status-page/:url端点返回完整的监视器对象，响应中包含用作HTTP Authorization凭据的secret字段，可能导致访问者提取凭据并用于受监控服务。

CVSS 7.5 · High EPSS 0.48% · P40

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
bluewave-labs Checkmate >= 3.3.0, < 3.9.2 affected
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I. Basic Information for CVE-2026-71862

Vulnerability Information
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Vulnerability Title
Checkmate: Sensitive Bearer Token Exposure via Public Status Pages When showURL Setting is Enabled
Source: CVE Program / CVE List V5
Vulnerability Description
Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations. From 3.3.0 until 3.9.2, enabling the global showURL setting causes the unauthenticated GET /api/v1/status-page/:url endpoint to return complete monitor objects from server/src/controllers/statusPageController.ts. The response includes the secret field used by HttpProvider.ts as an HTTP Authorization credential, even though BaseStatusPage.tsx does not display that value, allowing visitors to extract credentials from the JSON response and use them against monitored services. This issue is fixed in version 3.9.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
BlueWave Labs Checkmate 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BlueWave Labs Checkmate是BlueWave Labs组织的一款监控与运维管理工具。 BlueWave Labs Checkmate 3.3.0版本至3.9.2之前版本存在安全漏洞，该漏洞源于启用全局showURL设置导致未经身份验证的GET /api/v1/status-page/:url端点返回完整的监视器对象，响应中包含用作HTTP Authorization凭据的secret字段，可能导致访问者提取凭据并用于受监控服务。
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
bluewave-labs Checkmate >= 3.3.0, < 3.9.2 -

II. Public POCs for CVE-2026-71862

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: unauthenticated /api/v1/status-page/cve-page leaked monitor secret PROOF_563c1caed42db72a
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
Upgrade to Pro+
claude_code · 7991 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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POC zip download
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III. Intelligence Information for CVE-2026-71862

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Patches & Fixes for CVE-2026-71862 (2)

Vendor Advisories for CVE-2026-71862 (1)

Other References for CVE-2026-71862 (1)

Same Patch Batch · bluewave-labs · 2026-08-21 · 3 CVEs total

CVE-2026-55241 7.5 HIGH Checkmate: Pre-auth Denial of Service via File Upload on Registration
CVE-2026-70656 4.9 MEDIUM Checkmate: Regular Expression Denial of Service (ReDoS) via User-Controlled Regex in Monit

IV. Related Vulnerabilities

Same product: Checkmate
Same vendor: bluewave-labs
Same weakness: CWE-200

V. Comments for CVE-2026-71862

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