# CVE-2026-33396: OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.35, a low-privileged…

Source: https://junglewise.ai/threats/cve-2026-33396-oneuptime-is-an-open-source-monitoring-and-observability-platform  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-26  
License: CC BY 4.0 with a link back

CVE-2026-33396 · Severity: critical · CVSS 9.9 · Published 2026-03-26

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.

Technologies: [Hackerbay Oneuptime](https://junglewise.ai/threats/technologies/hackerbay-oneuptime). Vendors: [Hackerbay](https://junglewise.ai/threats/vendors/hackerbay).

## Quick answers

**Is CVE-2026-33396 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33396 being exploited in the wild.

**How severe is CVE-2026-33396?** Critical severity, with a CVSS score of 9.9, published 26 March 2026.

**Which products and versions are affected?** Hackerbay Oneuptime. The advisory does not name versions.

**Is there a fix for CVE-2026-33396?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-33396?** Check whether you run Hackerbay Oneuptime. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Hackerbay Oneuptime

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