CVE-2026-34759: Hackerbay Oneuptime

High severity, CVSS 8.1. EPSS: 0.7% chance of exploitation in the next 30 days.

OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, multiple notification API endpoints are registered without authentication middleware, while sibling endpoints in the same codebase correctly use ClusterKeyAuthorization.isAuthorizedServiceMiddleware. These endpoints are externally reachable via the Nginx proxy at /notification/. Combined with a projectId leak from the public Status Page API, an unauthenticated attacker can purchase phone numbers on the victim's Twilio account and delete all existing alerting numbers. This issue has been patched in version 10.0.42.

Affected products

• Hackerbay Oneuptime: before 10.0.42 (fixed in 10.0.42)

Published 2026-04-02. Last modified 2026-10-06.