Vulnerability · Published Mar 10, 2026 · Assigned by GitHub_M
CVE-2026-30957OneUptime Synthetic Monitor RCE via exposed Playwright browser object
Critical 10.0
In plain English
A critical-severity security flaw in oneuptime from OneUptime. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @oneuptime/common | 10.0.21 | GHSA-jw8q-gjvg-8w4q |
Affected products (as reported)
Weakness: CWE-749 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/OneUptime/oneuptime/security/advisories/GHSA-jw8q-gjvg-8w4q x_refsource_CONFIRM
- https://github.com/OneUptime/oneuptime/releases/tag/10.0.21 x_refsource_MISC