CVE-2026-27574Public exploitNetwork attack vector

Remote code execution via Node VM sandbox escape

Published Feb 21, 2026 · Updated Feb 21, 2026

Code injection in OneUptime before 10.0.5 allows remote authenticated users to execute commands through custom JavaScript monitors. VMRunner.ts passes project-supplied monitor scripts to vm.runInContext in Node.js's node:vm module, letting constructor-chain code reach process and invoke commands in the probe. ProjectMember access is sufficient, and default open registration lets remote attackers obtain that role; execution exposes cluster credentials and the probe's network reach.

CVSS severity9.9
Critical
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in OneUptime before 10.0.5 allows remote authenticated users to execute commands through custom JavaScript monitors. VMRunner.ts passes project-supplied monitor scripts to vm.runInContext in Node.js's node:vm module, letting constructor-chain code reach process and invoke commands in the probe. ProjectMember access is sufficient, and default open registration lets remote attackers obtain that role; execution exposes cluster credentials and the probe's network reach.

The record

CVE
CVE-2026-27574
Published
Feb 21, 2026
Updated
Feb 21, 2026
Vendor
OneUptime
Product
OneUptime
Classifications
CWE-94, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 10.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OneUptime · OneUptimeversion=< 10.0.5

Published CVSS scores

9.9GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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