EUVD-2026-18542
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3Tags
Description
OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, the Worker service's ManualAPI exposes workflow execution endpoints (GET /workflow/manual/run/:workflowId and POST /workflow/manual/run/:workflowId) without any authentication middleware. An attacker who can obtain or guess a workflow ID can trigger arbitrary workflow execution with attacker-controlled input data, enabling JavaScript code execution, notification abuse, and data manipulation. This issue has been patched in version 10.0.42.
Analysis
Unauthenticated remote code execution in OneUptime monitoring platform (versions < 10.0.42) allows attackers to trigger arbitrary workflow execution with controlled input data via exposed Worker service ManualAPI endpoints. The vulnerability enables JavaScript code execution, notification system abuse, and data manipulation without any authentication requirement. …
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Remediation
Within 24 hours: Identify all OneUptime deployments and document current versions; isolate any instances running versions < 10.0.42 from untrusted networks and restrict access to Worker ManualAPI endpoints to authorized internal systems only. Within 7 days: Contact OneUptime vendor for patch availability timeline and interim security guidance; implement network segmentation if patching is delayed. …
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External POC / Exploit Code
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