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.

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Fixes

Solution

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Workaround

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History

Thu, 26 Mar 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Hackerbay
Hackerbay oneuptime
CPEs cpe:2.3:a:hackerbay:oneuptime:*:*:*:*:*:*:*:*
Vendors & Products Hackerbay
Hackerbay oneuptime

Thu, 26 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 26 Mar 2026 13:45:00 +0000

Type Values Removed Values Added
Description 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.
Title OneUptime has sandbox escape in Synthetic Monitor Playwright runtime allows project members to execute arbitrary commands on Probe
Weaknesses CWE-184
CWE-693
CWE-78
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-26T13:56:13.442Z

Reserved: 2026-03-19T17:02:34.169Z

Link: CVE-2026-33396

cve-icon Vulnrichment

Updated: 2026-03-26T13:56:02.789Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-26T14:16:13.310

Modified: 2026-03-26T20:40:52.840

Link: CVE-2026-33396

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses