CVE-2026-33396

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 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.

Affected Software

VendorProductVersion RangeStatus
OneUptimeoneuptime< 10.0.35affected

Weaknesses

  • CWE-78: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
  • CWE-184: CWE-184: Incomplete List of Disallowed Inputs
  • CWE-693: CWE-693: Protection Mechanism Failure

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: total

Additional References

References