CVE-2026-33396

CRITICAL

9.9

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.

CVE Details

CVSS v3.1 Score9.9

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/26/2026

Last Modified3/26/2026

Sourcenvd

Honeypot Sightings0

Affected Products

hackerbay:oneuptime

Weaknesses (CWE)

CWE-78CWE-184CWE-693

References

https://github.com/OneUptime/oneuptime/commit/e8e4ee3ff0740eb131045ab3d67453141c46178a(security-advisories@github.com)

https://github.com/OneUptime/oneuptime/security/advisories/GHSA-cqpg-phpp-9jjg(security-advisories@github.com)

https://github.com/OneUptime/oneuptime/security/advisories/GHSA-cqpg-phpp-9jjg(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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