CVE-2026-35053

Critical

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.

SeverityCritical

CVSS9.8

Exploit probability—

ProductHackerbay Oneuptime

PublishedApr 2, 2026

First seenApr 2, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

hackerbay oneuptime10.0.42 or later

Affected products

Product	Affected versions	Fixed in
hackerbay oneuptime	v < 10.0.42	10.0.42

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.