CVE-2026-85390— Checkmate through 3.11.0 Missing Authorization on Maintenance Window, Notification, and Check Deletion Routes
Quick assessment
Affected
bluewave-labs Checkmate
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.
Checkmate 3.11.0 版本在维护窗口（maintenance-window）、通知（notification）和检查删除（check-deletion）路由中省略了 角色守卫中间件，导致只读用户能够执行管理操作。拥有用户角色会话的攻击者可以创建任意维护窗口以静默告警、修改通知渠道，并删除监控检查历史以抹除事件证据。
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| bluewave-labs | Checkmate | ≤ 3.11.0 |
affected |
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I. Basic Information for CVE-2026-85390
Vulnerability Information
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Vulnerability Title
Checkmate through 3.11.0 Missing Authorization on Maintenance Window, Notification, and Check Deletion Routes
Source: CVE Program / CVE List V5
Vulnerability Description
Checkmate through 3.11.0 omits the isAllowed role guard middleware on maintenance-window, notification, and check-deletion routes, allowing read-only users to perform administrative actions. Attackers with user-role sessions can create arbitrary maintenance windows to silence alerts, modify notification channels, and delete monitor check history to erase incident evidence.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| bluewave-labs | Checkmate | 0 ~ 3.11.0 | - |
|
II. Public POCs for CVE-2026-85390
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-85390 (1)
Vendor Advisories for CVE-2026-85390 (1)
Proof of Concept for CVE-2026-85390 (1)
Security Blog Posts for CVE-2026-85390 (1)
IV. Related Vulnerabilities
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Mass Assignment Privilege Escalation in Checkmate
Same vendor: bluewave-labs
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CVE-2026-71862
Checkmate: Sensitive Bearer Token Exposure via Public Status -
CVE-2026-70656
Checkmate: Regular Expression Denial of Service (ReDoS) via -
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Checkmate: Pre-auth Denial of Service via File Upload on Reg -
CVE-2026-72588
bluewave-labs Checkmate - User Enumeration via Differential -
CVE-2026-31836
Mass Assignment Privilege Escalation in Checkmate
Same weakness: CWE-862
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V. Comments for CVE-2026-85390
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