{"id":"CVE-2026-33396","title":"OneUptime is an open-source monitoring and observability platform","summary":"OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.35, a low-privileged authenticated user (ProjectMember) can achieve remote command execution on the Probe container/host by abusing Synthetic Monito…","severity":"critical","cvss":9.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-78","CWE-184","CWE-693"],"vendor":"hackerbay","product":"oneuptime","affected":["oneuptime < 10.0.35"],"patched":["oneuptime 10.0.35"],"published":"2026-03-26","updated":"2026-10-07","sourceUpdated":"2026-10-07T08:10:00.200","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-33396","references":[{"url":"https://github.com/OneUptime/oneuptime/commit/e8e4ee3ff0740eb131045ab3d67453141c46178a","label":"security-advisories@github.com"},{"url":"https://github.com/OneUptime/oneuptime/security/advisories/GHSA-cqpg-phpp-9jjg","label":"security-advisories@github.com"},{"url":"https://github.com/OneUptime/oneuptime/security/advisories/GHSA-cqpg-phpp-9jjg","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.0115,"epssPercentile":0.6585,"ingestedAt":"2026-10-07T08:20:03.905Z","slug":"CVE-2026-33396","body":"## Overview\n\nOneUptime is an open-source monitoring and observability platform. Prior to version 10.0.35, a low-privileged authenticated user (ProjectMember) can achieve remote command execution on the Probe container/host by abusing Synthetic Monitor Playwright script execution. Synthetic monitor code is executed in VMRunner.runCodeInNodeVM with a live Playwright page object in context. The sandbox relies on a denylist of blocked properties/methods, but it is incomplete. Specifically, _browserType and launchServer are not blocked, so attacker code can traverse `page.context().browser()._browserType.launchServer(...)` and spawn arbitrary processes. Version 10.0.35 contains a patch.\n\n## Affected\n\n- `oneuptime < 10.0.35`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `oneuptime 10.0.35`","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":54.5,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}