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 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.
{
"cwe_ids": [
"CWE-184",
"CWE-693",
"CWE-78"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33396.json",
"cna_assigner": "GitHub_M"
}{
"cpe": "cpe:2.3:a:hackerbay:oneuptime:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "10.0.35"
}
],
"source": [
"CPE_RANGE",
"REFERENCES"
]
}