CVE Watch21 ago 2026

CVE-2026-70656

Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-t

CVSS

4.9

Medio

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 21 ago 2026 · Última mod.: 21 ago 2026 · CWE-1333

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

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 3.5.1 until 3.9.2, an authenticated admin or superadmin can set matchMethod to regex and place a malicious expression in the expectedValue field for advanced HTTP monitor matching. server/src/api/validation/monitorValidation.ts accepts the expression, and server/src/service/network/AdvancedMatcher.ts synchronously evaluates it against an attacker-controlled HTTP response body on the Node.js main event loop without a timeout or worker isolation, allowing catastrophic backtracking to freeze API endpoints, monitor checks, and WebSocket connections for all users. This issue is fixed in version 3.9.2.

Referencias oficiales

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