by Kastro
Paper/Archive/CVE-2026-30957

CVE-2026-30957

OneUptime oneuptime — OneUptime Synthetic Monitor RCE via exposed Playwright browser object

EPSS 1%public exploitCVSS 10.0
critical.is priorityof 100
54
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 68.8.688 × 2013.8Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
oneuptime< 10.0.21–CNA

Scores by source

GitHub_M (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

refgithub.com/OneUptime/oneuptime/security/advisories/GHSA-jw8q-gjvg-8w4qrefgithub.com/OneUptime/oneuptime/releases/tag/10.0.21