Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Hackerbay | Oneuptime | < 10.0.21 |
Related Weaknesses (CWE)
References
- https://github.com/OneUptime/oneuptime/releases/tag/10.0.21ProductRelease Notes
- https://github.com/OneUptime/oneuptime/security/advisories/GHSA-jw8q-gjvg-8w4qExploitVendor Advisory
FAQ
What is CVE-2026-30957?
CVE-2026-30957 is a vulnerability with a CVSS score of 9.9 (CRITICAL). 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 t...
How severe is CVE-2026-30957?
CVE-2026-30957 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-30957?
Check the references section above for vendor advisories and patch information. Affected products include: Hackerbay Oneuptime.