CVE-2026-30957
published 2026-03-10CVE-2026-30957: OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, OneUptime Synthetic Monitors allow a low-privileged authenticated…
PriorityP273critical9.9CVSS 3.1
AVNACLPRLUINSCCHIHAH
EPSS
1.15%
63.0th percentile
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
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| hackerbay | oneuptime | < 10.0.21 | 10.0.21 |
| oneuptime | common | >= 0 < 10.0.21 | 10.0.21 |
| oneuptime | oneuptime | < 10.0.21 | 10.0.21 |
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OSV
OneUptime has Synthetic Monitor RCE via exposed Playwright browser object
osv·2026-03-10
CVE-2026-30957 [CRITICAL] OneUptime has Synthetic Monitor RCE via exposed Playwright browser object
OneUptime has Synthetic Monitor RCE via exposed Playwright browser object
### Summary
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.
## Details
A normal project member can create or edit monitors and monitor tests:
- `Monitor` access control: https://github.com/OneUptime/oneupt
GHSA
OneUptime has Synthetic Monitor RCE via exposed Playwright browser object
ghsa·2026-03-10
CVE-2026-30957 [CRITICAL] CWE-749 OneUptime has Synthetic Monitor RCE via exposed Playwright browser object
OneUptime has Synthetic Monitor RCE via exposed Playwright browser object
### Summary
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.
## Details
A normal project member can create or edit monitors and monitor tests:
- `Monitor` access control: https://github.com/OneUptime/oneupt
No detection rules found.
No public exploits indexed.
2026-03-10
Published