What’s Vulnerable › Vulnerabilities

CVE-2026-35053: OneUptime: Unauthenticated Workflow Execution via ManualAPI

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-02 · updated 2026-10-06
• Weakness: CWE-306

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.

Affected products

• oneuptime: before 10.0.42 — fixed in 10.0.42

How to fix

Upgrade to a fixed version: oneuptime 10.0.42. Check the vendor advisory for mitigations.

References

• https://github.com/OneUptime/oneuptime/releases/tag/10.0.42
• https://github.com/OneUptime/oneuptime/security/advisories/GHSA-6c3w-7xg4-4cf7

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