# CVE-2026-30957

## Summary

- **CVE ID:** CVE-2026-30957
- **Severity:** CRITICAL
- **CVSS Score:** 10 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
- **CWE:** CWE-749
- **Published:** Mar 10, 2026
- **Last Modified:** Mar 10, 2026

## Description

OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, OneUptime Synthetic Monitors allow a low-privileged authenticated project user to execute arbitrary commands on the oneuptime-probe server/container. The root cause is that untrusted Synthetic Monitor code is executed inside Node's vm while live host-realm Playwright browser and page objects are exposed to it. A malicious user can call Playwright APIs on the injected browser object and cause the probe to spawn an attacker-controlled executable. This is a server-side remote code execution issue. It does not require a separate vm sandbox escape. This vulnerability is fixed in 10.0.21.

## Affected Products

- OneUptime — oneuptime (< 10.0.21)

## References

- [CNA](https://github.com/OneUptime/oneuptime/security/advisories/GHSA-jw8q-gjvg-8w4q)
- [CNA](https://github.com/OneUptime/oneuptime/releases/tag/10.0.21)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.15%
- **EPSS Percentile:** 65.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._