CVE-2026-33396

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.

CVSS 3.1

9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS

0.8% chance of exploitation in the next 30 days; higher than 57% of CVEs (scores of 2026-10-25)

CWEs

CWE-78, CWE-184, CWE-693

Published

2026-03-26

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

Affected

• hackerbay:oneuptime

References

• https://github.com/OneUptime/oneuptime/commit/e8e4ee3ff0740eb131045ab3d67453141c46178a
• https://github.com/OneUptime/oneuptime/security/advisories/GHSA-cqpg-phpp-9jjg
• https://github.com/OneUptime/oneuptime/security/advisories/GHSA-cqpg-phpp-9jjg

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