---
title: "CVE-2026-27574: OneUptime:: node:vm sandbox escape in probe allows any project member to achieve RCE"
url: https://erroneo.us/security/cve/CVE-2026-27574/
description: "CVE-2026-27574 (@oneuptime/common (npm)): OneUptime is a solution for monitoring and managing online services. In versions 9.5.13 and below, custom…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-02-21
date_modified: 2026-02-24
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-27574"
kev: false
cvss: 10
epss: 0.00689
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-27574: OneUptime:: node:vm sandbox escape in probe allows any project member to achieve RCE

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.7% , percentile 52: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 52% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes @oneuptime/common (npm) < 10.0.0, fixed in 10.0.0 . Check your lockfile, including transitive dependencies.

## What it is

OneUptime is a solution for monitoring and managing online services. In versions 9.5.13 and below, custom JavaScript monitor feature uses Node.js's node:vm module (explicitly documented as not a security mechanism) to execute user-supplied code, allowing trivial sandbox escape via a well-known one-liner that grants full access to the underlying process. Because the probe runs with host networking and holds all cluster credentials (ONEUPTIMESECRET, DATABASEPASSWORD, REDISPASSWORD, CLICKHOUSEPASSWORD) in its environment variables, and monitor creation is available to the lowest role (ProjectMember) with open registration enabled by default, any anonymous user can achieve full cluster compromise in about 30 seconds. This issue has been fixed in version 10.0.5.

## Affected packages

- npm `@oneuptime/common` < 10.0.0 → fixed: 10.0.0

## Affected products (CVE record)

- OneUptime oneuptime: < 10.0.5

## Severity

- GitHub_M CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.9 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.69% probability of exploitation activity in the next 30 days; percentile 52.

## Sources

- [GitHub Advisory GHSA-v264-xqh4-9xmm](https://github.com/advisories/GHSA-v264-xqh4-9xmm)
- [CVE.org record CVE-2026-27574](https://www.cve.org/CVERecord?id=CVE-2026-27574)
- [NVD entry CVE-2026-27574](https://nvd.nist.gov/vuln/detail/CVE-2026-27574)
- [github.com](https://github.com/OneUptime/oneuptime/security/advisories/GHSA-v264-xqh4-9xmm)
- [github.com](https://github.com/OneUptime/oneuptime/commit/7f9ed4d43945574702a26b7c206e38cc344fe427)

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Source page: https://erroneo.us/security/cve/CVE-2026-27574/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt