Authenticated code execution via VMRunner sandbox escape
Published May 27, 2026 · Updated May 27, 2026
Remote code execution in OneUptime before 10.0.98 allows remote authenticated users to execute code through a synthetic monitor. The VMRunner treats Node.js vm as a security boundary, while recursive error handling exposes prototype constructors that reach process bindings and spawn commands. Regular project membership and permission to create and test a Playwright synthetic monitor are required; successful exploitation executes code on the server.
Summary
What happened
Remote code execution in OneUptime before 10.0.98 allows remote authenticated users to execute code through a synthetic monitor. The VMRunner treats Node.js vm as a security boundary, while recursive error handling exposes prototype constructors that reach process bindings and spawn commands. Regular project membership and permission to create and test a Playwright synthetic monitor are required; successful exploitation executes code on the server.
The record
- CVE
- CVE-2026-45102
- Published
- May 27, 2026
- Updated
- May 27, 2026
- Vendor
- OneUptime
- Product
- OneUptime
- Classifications
- CWE-693, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 27, 2026CVE publishedPublication date reported by the CVE source.
- May 27, 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.
- Affected versionversion=< 10.0.98
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Public exploit references
- GHSA-g9cp-35m2-fjv6 synthetic-monitor proof of conceptproof of concept · demonstrated
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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