---
id: CVE-2026-30957
title: OneUptime is a solution for monitoring and managing online services
summary: >-
  OneUptime is a solution for monitoring and managing online services. Prior to
  10.0.21, OneUptime Synthetic Monitors allow a low-privileged authenticated
  project user to execute arbitrary commands on the oneuptime-probe
  server/container. …
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-749
vendor: hackerbay
product: oneuptime
affected:
  - oneuptime < 10.0.21
patched:
  - oneuptime 10.0.21
published: '2026-03-10'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T08:10:00.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-30957'
references:
  - url: 'https://github.com/OneUptime/oneuptime/releases/tag/10.0.21'
    label: security-advisories@github.com
  - url: >-
      https://github.com/OneUptime/oneuptime/security/advisories/GHSA-jw8q-gjvg-8w4q
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.01198
epssPercentile: 0.67192
ingestedAt: '2026-10-07T08:20:03.899Z'
---

## Overview

OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, OneUptime Synthetic Monitors allow a low-privileged authenticated project user to execute arbitrary commands on the oneuptime-probe server/container. The root cause is that untrusted Synthetic Monitor code is executed inside Node's vm while live host-realm Playwright browser and page objects are exposed to it. A malicious user can call Playwright APIs on the injected browser object and cause the probe to spawn an attacker-controlled executable. This is a server-side remote code execution issue. It does not require a separate vm sandbox escape. This vulnerability is fixed in 10.0.21.

## Affected

- `oneuptime < 10.0.21`

## Remediation

Upgrade past the affected range:

- `oneuptime 10.0.21`