EUVD-2026-18511CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
3Description
OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, unauthenticated access to Notification test and Phone Number management endpoints allows SMS/Call/Email/WhatsApp abuse and phone number purchase. This issue has been patched in version 10.0.42.
Analysis
Unauthenticated access to notification and phone management endpoints in OneUptime <10.0.42 allows remote attackers to abuse SMS, voice call, email, and WhatsApp messaging services and purchase phone numbers without authentication. The CVSS 9.1 (Critical) rating reflects network-accessible attack vector with no authentication required (PR:N) and low complexity (AC:L), enabling immediate abuse of platform communication services and potential financial fraud. …
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Remediation
Within 24 hours: Identify all OneUptime instances and their versions; isolate or restrict network access to notification and phone management endpoints if running versions below 10.0.42. Within 7 days: Apply vendor-released patch to OneUptime version 10.0.42 or later across all affected instances; validate through test environment first. …
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External POC / Exploit Code
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