OneUptime up to 10.0.34 Playwright Page os command injection

Summaryinfo

A vulnerability classified as critical was found in OneUptime up to 10.0.34. The affected element is an unknown function of the component Playwright Page. Such manipulation leads to os command injection. This vulnerability is uniquely identified as CVE-2026-33396. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in OneUptime up to 10.0.34. Affected by this issue is an unknown function of the component Playwright Page. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-33396 since 03/19/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1202.

Upgrading to version 10.0.35 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-16189). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• OneUptime

Version

• 10.0.0
• 10.0.1
• 10.0.2
• 10.0.3
• 10.0.4
• 10.0.5
• 10.0.6
• 10.0.7
• 10.0.8
• 10.0.9
• 10.0.10
• 10.0.11
• 10.0.12
• 10.0.13
• 10.0.14
• 10.0.15
• 10.0.16
• 10.0.17
• 10.0.18
• 10.0.19
• 10.0.20
• 10.0.21
• 10.0.22
• 10.0.23
• 10.0.24
• 10.0.25
• 10.0.26
• 10.0.27
• 10.0.28
• 10.0.29
• 10.0.30
• 10.0.31
• 10.0.32
• 10.0.33
• 10.0.34

Website

• Product: https://github.com/OneUptime/oneuptime/

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Once again VulDB remains the best source for vulnerability data.

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