CVE-2026-33396

OneUptime prior to 10.0.35 allows a low-privileged authenticated user (ProjectMember) to escape sandbox in Synthetic Monitor Playwright runtime and execute arbitrary commands on the Probe container/host. The sandbox denial-list omits blocking _browserType and launchServer, enabling traversal via ...

CVE-2026-33396 OneUptime has sandbox escape in Synthetic Monitor Playwright runtime allows project members to execute arbitrary commands on Probe

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 Monitor Playwright script execution. Synthetic monitor code is...

CVE-2026-33396 OneUptime has sandbox escape in Synthetic Monitor Playwright runtime allows project members to execute arbitrary commands on Probe

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 Monitor Playwright script execution. Synthetic monitor code is...