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

What is CVE-2026-35053?

CVE-2026-35053 is a critical missing authorization vulnerability in oneuptime, published on 2 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-306

Which versions are affected by CVE-2026-35053?

It affects 1 product.

Products include Hackerbay Oneuptime.

How do I fix CVE-2026-35053?

No fix has been published for CVE-2026-35053 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-35053 being exploited?

There is no known exploitation of CVE-2026-35053 in the wild and no public exploit code.

Other vulnerabilities in oneuptime

• CVE-2026-33396 Code injection in oneuptime Critical 10.0
• CVE-2026-32306 OneUptime ClickHouse SQL Injection via Aggregate Query Parameters Critical 10.0
• CVE-2026-30956 OneUptime has authorization bypass via client‑controlled is-multi-tenant-query header Critical 10.0
• CVE-2026-30957 OneUptime Synthetic Monitor RCE via exposed Playwright browser object Critical 10.0
• CVE-2026-30887 OneUptime Affected by Unsandboxed Code Execution in Probe Allows Any Project Member to Achieve RCE Critical 10.0

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-6c3w-7xg4-4cf7.