CVE-2026-33396

CRITICAL EPSS 53.0%
Published Mar 26, 20263mo ago · Modified Jun 17, 20261w ago
9.9 CVSS 3.1
Critical
Find Similar
Published Mar 26, 2026 3mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
9.9
Exploitability
3.1
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
53.0% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 3

CWE-184
CWE-693
CWE-78 OS Command Injection Injection

Affected Products 1

VendorProductVersionRange
hackerbayoneuptime* <10.0.35

References 2

  • github.com https://github.com/OneUptime/oneuptime/commit/e8e4ee3ff0740eb131045ab3d67453141c46178a
    Patch
  • github.com https://github.com/OneUptime/oneuptime/security/advisories/GHSA-cqpg-phpp-9jjg
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/OneUptime/oneuptime/commit/e8e4ee3ff0740eb131045ab3d67453141c46178a
    Patch