CVE-2026-30957

OneUptime Synthetic Monitor RCE via exposed Playwright browser object

Published Mar 10, 2026 CVSS 3.1 · 10 Critical EPSS 1.3% KEV · Not listed
Description
OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, OneUptime Synthetic Monitors allow a low-privileged authenticated project user to execute arbitrary commands on the oneuptime-probe server/container. The root cause is that untrusted Synthetic Monitor code is executed inside Node's vm while live host-realm Playwright browser and page objects are exposed to it. A malicious user can call Playwright APIs on the injected browser object and cause the probe to spawn an attacker-controlled executable. This is a server-side remote code execution issue. It does not require a separate vm sandbox escape. This vulnerability is fixed in 10.0.21.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-jw8q-gjvg-8w4q OneUptime has Synthetic Monitor RCE via exposed Playwright browser object
History
Type Values Removed Values Added
First Time appeared Hackerbay
Hackerbay oneuptime
CPEs cpe:2.3:a:hackerbay:oneuptime:*:*:*:*:*:*:*:*
Vendors & Products Hackerbay
Hackerbay oneuptime
Type Values Removed Values Added
First Time appeared Oneuptime
Oneuptime oneuptime
Vendors & Products Oneuptime
Oneuptime oneuptime
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, OneUptime Synthetic Monitors allow a low-privileged authenticated project user to execute arbitrary commands on the oneuptime-probe server/container. The root cause is that untrusted Synthetic Monitor code is executed inside Node's vm while live host-realm Playwright browser and page objects are exposed to it. A malicious user can call Playwright APIs on the injected browser object and cause the probe to spawn an attacker-controlled executable. This is a server-side remote code execution issue. It does not require a separate vm sandbox escape. This vulnerability is fixed in 10.0.21.
Title OneUptime Synthetic Monitor RCE via exposed Playwright browser object
Weaknesses CWE-749
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Mar 10, 2026, 6:22 PM
Reserved
Mar 7, 2026, 5:34 PM
Status
Analyzed
Published
Mar 10, 2026, 6:18 PM
Modified
Oct 7, 2026, 8:10 AM