CVE-2026-30887Public exploitNetwork attack vector

Cluster compromise via synthetic monitor sandbox escape

Published Mar 9, 2026 · Updated Mar 9, 2026

Code injection in OneUptime before 10.0.18 allows remote authenticated users to execute commands in the probe container via a synthetic monitor. VMRunner.ts passes project-supplied Playwright JavaScript to Node.js vm.runInContext, allowing a constructor-chain escape to expose process and child_process. Project membership is required, but default open registration exposes that gate; probe environment credentials enable compromise of the backing database or cluster.

CVSS severity9.9
Critical
EPSS probability0.39%
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 10.0.18 allows remote authenticated users to execute commands in the probe container via a synthetic monitor. VMRunner.ts passes project-supplied Playwright JavaScript to Node.js vm.runInContext, allowing a constructor-chain escape to expose process and child_process. Project membership is required, but default open registration exposes that gate; probe environment credentials enable compromise of the backing database or cluster.

The record

CVE
CVE-2026-30887
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
OneUptime
Product
OneUptime
Classifications
CWE-94, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 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=< 10.0.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OneUptime · OneUptimeversion=< 10.0.18

Published CVSS scores

9.9GitHubCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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/JScript

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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