CVE-2026-71862 Checkmate: Sensitive Bearer Token Exposure via Public Status Pages When showURL Setting is Enabled
Enabling the showURL setting exposes sensitive bearer tokens in API responses, allowing attackers to steal credentials for monitored services.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71862?
CVE-2026-71862 is a high-severity vulnerability in bluewave-labs Checkmate, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-71862?
How do I fix CVE-2026-71862?
No fix has been published for CVE-2026-71862 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-71862 being exploited?
There is no known exploitation of CVE-2026-71862 in the wild and no public exploit code.
Sources
Also known as GHSA-3m74-8cg9-rp8j.