{"cve":"CVE-2026-30921","nvd":{"published":"2026-03-10T17:40:16.160","modified":"2026-06-17T10:33:09.203","status":"Analyzed","description":"OneUptime is a solution for monitoring and managing online services. Prior to 10.0.20, OneUptime Synthetic Monitors allow low-privileged project users to submit custom Playwright code that is executed on the oneuptime-probe service. In the current implementation, this untrusted code is run inside Node's vm and is given live host Playwright objects such as browser and page. This creates a distinct server-side RCE primitive: the attacker does not need the classic this.constructor.constructor(...) sandbox escape. Instead, the attacker can directly use the injected Playwright browser object to reach browser.browserType().launch(...) and spawn an arbitrary executable on the probe host/container. This vulnerability is fixed in 10.0.20.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":9.9},"cwes":["CWE-749"],"references":["https://github.com/OneUptime/oneuptime/security/advisories/GHSA-4j36-39gm-8vq8"],"products":["hackerbay:oneuptime"],"source":"nvd","synced_at":"2026-10-19T22:25:53.701907451+00:00"},"epss":{"cve":"CVE-2026-30921","score":0.00462,"percentile":0.40093,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-4j36-39gm-8vq8","url":"https://osv.dev/vulnerability/GHSA-4j36-39gm-8vq8","summary":"OneUptime: Synthetic Monitor RCE via exposed Playwright browser object","modified":"2026-03-10T19:01:33.257681Z","packages":[{"ecosystem":"npm","name":"@oneuptime/common","purl":"pkg:npm/%40oneuptime/common","ranges":["<10.0.20"],"fixed":["10.0.20"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}