oneuptime up to 10.0.17 Environment Variable this.constructor.constructor code injection

Summaryinfo

A vulnerability was found in oneuptime up to 10.0.17. It has been classified as critical. Affected by this vulnerability is the function this.constructor.constructor of the component Environment Variable Handler. This manipulation causes code injection. This vulnerability is handled as CVE-2026-30887. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in oneuptime up to 10.0.17. Affected by this vulnerability is the function this.constructor.constructor of the component Environment Variable Handler. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

OneUptime is a solution for monitoring and managing online services. Prior to 10.0.18, OneUptime allows project members to run custom Playwright/JavaScript code via Synthetic Monitors to test websites. However, the system executes this untrusted user code inside the insecure Node.js vm module. By leveraging a standard prototype-chain escape (this.constructor.constructor), an attacker can bypass the sandbox, gain access to the underlying Node.js process object, and execute arbitrary system commands (RCE) on the oneuptime-probe container. Furthermore, because the probe holds database/cluster credentials in its environment variables, this directly leads to a complete cluster compromise. This vulnerability is fixed in 10.0.18.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-30887 since 03/06/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

Upgrading to version 10.0.18 eliminates this vulnerability.

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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

Website

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

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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