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.
Metrics
Affected Vendors & Products
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History
Tue, 10 Mar 2026 15:30:00 +0000
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ssvc
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Tue, 10 Mar 2026 14:15:00 +0000
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Oneuptime
Oneuptime oneuptime |
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Oneuptime
Oneuptime oneuptime |
Mon, 09 Mar 2026 23:15:00 +0000
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| Description | 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. | |
| Title | OneUptime Synthetic Monitor RCE via exposed Playwright browser object | |
| Weaknesses | CWE-749 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-03-09T22:58:58.618Z
Updated: 2026-03-10T14:13:54.890Z
Reserved: 2026-03-07T16:40:05.884Z
Link: CVE-2026-30921
Updated: 2026-03-10T14:12:13.746Z
Status : Received
Published: 2026-03-10T17:40:16.160
Modified: 2026-03-10T17:40:16.160
Link: CVE-2026-30921
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