Auth bypass in Hackerbay Oneuptime
CVE-2026-35053
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.
Vulnerability class: Broken Authentication
EPSS: 0.005 (42.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Hackerbay Oneuptime
- Oneuptime — versions < 10.0.42
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-35053?
- CVE-2026-35053 is a critical-severity vulnerability in Hackerbay Oneuptime, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-04-02.
- How severe is CVE-2026-35053?
- Critical severity. CVSS v3 base score is 9.8 out of 10.