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TI-2026-50184 Aliases CVE-2026-71862

Checkmate: Sensitive Bearer Token Exposure via Public Status Pages When showURL Setting is Enabled

Priority LOW 39CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00482 41st percentileScored 2026-11-07
Fix Fixed Checkmate (bluewave-labs): 3.9.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
bluewave-labsCheckmate3.3.0 to before 3.9.23.9.2Patch availableCNA
  • Checkmate Vendorbluewave-labs Affected 3.3.0 to before 3.9.2 Fixed in 3.9.2 Patch available CNA

Remediation

  • Fix · CNA Checkmate (bluewave-labs) Fixed in 3.9.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-71862

References

Other 4

  • TI-2026-39916 Checkmate: Pre-auth Denial of Service via File Upload on Registration CVSS 3.1HIGH 7.5
  • TI-2026-24389 Mass Assignment Privilege Escalation in Checkmate CVSS 3.1HIGH 8.1
  • TI-2026-58598 Checkmate through 3.11.0 Missing Authorization on Maintenance Window, Notification, and Check Deletion Routes CVSS 4.0HIGH 7.1
  • TI-2026-23658 Checkmate: Unauthenticated Access to Unpublished Status Page CVSS 3.1MEDIUM 5.3
  • TI-2026-49357 Checkmate: Regular Expression Denial of Service (ReDoS) via User-Controlled Regex in Monitor Advanced Matching CVSS 3.1MEDIUM 4.9
  • TI-2026-50845 bluewave-labs Checkmate - User Enumeration via Differential HTTP Response in Password Recovery CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences