CVE-2026-30921
CVE-2026-30921 · OneUptime Synthetic Monitor RCE via exposed Playwright browser object
This page contains facts from public vulnerability sources. Check the original advisory before updating.
OneUptime is a solution for monitoring and managing online services. Prior to 10.0.20, OneUptime Synthetic Monitors allow low-privileged project users to submit custom Playwright code that is executed on the oneuptime-probe service. In the current implementation, this untrusted code is run inside Node's vm and is given live host Playwright objects such as browser and page. This creates a distinct server-side RCE primitive: the attacker does not need the classic this.constructor.constructor(...) sandbox escape. Instead, the attacker can directly use the injected Playwright browser object to reach browser.browserType().launch(...) and spawn an arbitrary executable on the probe host/container. This vulnerability is fixed in 10.0.20.
CVSS 10.0 · Critical · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
oneuptime
- Versions
- < 10.0.20: Affected
No fix published
@oneuptime/common npm
- Affected ranges
- SEMVER: < 10.0.20
Update to 10.0.20