---
id: CVE-2026-33396
title: OneUptime is an open-source monitoring and observability platform
summary: >-
  OneUptime is an open-source monitoring and observability platform. Prior to
  version 10.0.35, a low-privileged authenticated user (ProjectMember) can
  achieve remote command execution on the Probe container/host by abusing
  Synthetic Monito…
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-78
  - CWE-184
  - CWE-693
vendor: hackerbay
product: oneuptime
affected:
  - oneuptime < 10.0.35
patched:
  - oneuptime 10.0.35
published: '2026-03-26'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T08:10:00.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-33396'
references:
  - url: >-
      https://github.com/OneUptime/oneuptime/commit/e8e4ee3ff0740eb131045ab3d67453141c46178a
    label: security-advisories@github.com
  - url: >-
      https://github.com/OneUptime/oneuptime/security/advisories/GHSA-cqpg-phpp-9jjg
    label: security-advisories@github.com
  - url: >-
      https://github.com/OneUptime/oneuptime/security/advisories/GHSA-cqpg-phpp-9jjg
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.0115
epssPercentile: 0.6585
ingestedAt: '2026-10-07T08:20:03.905Z'
---

## Overview

OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.35, a low-privileged authenticated user (ProjectMember) can achieve remote command execution on the Probe container/host by abusing Synthetic Monitor Playwright script execution. Synthetic monitor code is executed in VMRunner.runCodeInNodeVM with a live Playwright page object in context. The sandbox relies on a denylist of blocked properties/methods, but it is incomplete. Specifically, _browserType and launchServer are not blocked, so attacker code can traverse `page.context().browser()._browserType.launchServer(...)` and spawn arbitrary processes. Version 10.0.35 contains a patch.

## Affected

- `oneuptime < 10.0.35`

## Remediation

Upgrade past the affected range:

- `oneuptime 10.0.35`