Checkmate: Sensitive Bearer Token Exposure via Public Status Pages When showURL Setting is Enabled (CVE-2026-71862) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-71862

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

Answer in brief

CVE-2026-71862 records a Unknown severity vulnerability in Checkmate: Sensitive Bearer Token Exposure via Public Status Pages When showURL Setting is Enabled. The current sources do not mark it as known exploited. The current feed maps bluewave-labs/Checkmate (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 21, 2026Updated Aug 21, 2026Source checked Aug 21, 2026First seen by HOL Aug 21, 2026Material review Aug 21, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps bluewave-labs/Checkmate (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
bluewave-labs/Checkmategeneric	>= 3.3.0, < 3.9.2	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for bluewave-labs/Checkmate.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 21, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.