{"id":"CVE-2026-30957","aliases":["GHSA-jw8q-gjvg-8w4q"],"url":"https://o3.security/vulnerability/CVE-2026-30957","summary":"OneUptime Synthetic Monitor RCE via exposed Playwright browser object","details":"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.","published":"2026-03-10T16:58:28.216Z","modified":"2026-08-07T11:50:09.269875988Z","cvss":{"score":9.9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@oneuptime/common","fixedVersion":"10.0.21"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/OneUptime/oneuptime/releases/tag/10.0.21"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30957.json"},{"type":"ADVISORY","url":"https://github.com/OneUptime/oneuptime/security/advisories/GHSA-jw8q-gjvg-8w4q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30957"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:50:09.269875988Z"}}