GHSA-jw8q-gjvg-8w4q · Severity: critical · Ecosystem: npm — OneUptime has Synthetic Monitor RCE via exposed Playwright browser object
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.
Conclusion & alert: CVE-2026-30957 is rated High Exploit Risk (63.8/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.10%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-04-21 | 0.27% | 0.10% | -0.17% |
| 2 | 2026-04-11 | 0.21% | 0.27% | +0.06% |
| 3 | 2026-03-13 | — | 0.21% | — |
Full EPSS history (4 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.9 | 3.1 | CRITICAL |
|
3.1 | 6.0 | [email protected] |
GHSA-jw8q-gjvg-8w4q · Severity: critical · Ecosystem: npm — OneUptime has Synthetic Monitor RCE via exposed Playwright browser object
| URL | Tags |
|---|---|
| https://github.com/OneUptime/oneuptime/releases/tag/10.0.21 | Product Release Notes |
| https://github.com/OneUptime/oneuptime/security/advisories/GHSA-jw8q-gjvg-8w4q | Exploit Vendor Advisory |