TI-2026-23746 Aliases CVE-2026-30921 GHSA-4j36-39gm-8vq8

OneUptime Synthetic Monitor RCE via exposed Playwright browser object

HIGH 76CWE-749Published 2026-03-09 · Updated 2026-03-10

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

OneUptime is a solution for monitoring and managing online services. Prior to 10.0.20, OneUptime Synthetic Monitors allow low-privileged project users to submit custom Playwright code that is executed on the oneuptime-probe service. In the current implementation, this untrusted code is run inside Node's vm and is given live host Playwright objects such as browser and page. This creates a distinct server-side RCE primitive: the attacker does not need the classic this.constructor.constructor(...) sandbox escape. Instead, the attacker can directly use the injected Playwright browser object to reach browser.browserType().launch(...) and spawn an arbitrary executable on the probe host/container. This vulnerability is fixed in 10.0.20.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0049 42nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed oneuptime (OneUptime): 10.0.20@oneuptime/common (npm): 10.0.20

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
OneUptime	oneuptime	before 10.0.20	10.0.20	Patch available	CNA
—	@oneuptime/common (npm)	before 10.0.20	10.0.20	Patch available	GHSA-4j36-39gm-8vq8

oneuptime VendorOneUptime Affected before 10.0.20 Fixed in 10.0.20 Patch available CNA
@oneuptime/common (npm) Vendor— Affected before 10.0.20 Fixed in 10.0.20 Patch available GHSA-4j36-39gm-8vq8

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:hackerbay:oneuptime::::::::	before 10.0.20	Vulnerable	OneUptime

cpe:2.3:a:hackerbay:oneuptime:*:*:*:*:*:*:*:* Versions before 10.0.20 Vulnerable ·OneUptime

Remediation

Fix · CNA oneuptime (OneUptime) Fixed in 10.0.20
Fix · GHSA-4j36-39gm-8vq8 @oneuptime/common (npm) Fixed in 10.0.20 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-30921
2026-10-03 Alias added: GHSA-4j36-39gm-8vq8

References

Exploit 1

https://github.com/OneUptime/oneuptime/security/advisories/GHSA-4j36-39gm-8vq8

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-30921

Other 10

TI-2026-22090 OneUptime: OS Command Injection in Probe NetworkPathMonitor via unsanitized destination in traceroute exec() CVSS 3.1CRITICAL 10.0
TI-2026-27002 OneUptime: Missing Authentication on Notification Endpoints CVSS 3.1CRITICAL 9.1
TI-2026-25573 OneUptime: WhatsApp Webhook Missing Signature Verification CVSS 4.0HIGH 8.7
TI-2025-40534 OneUptime Unauthorized User Creation via API CVSS 4.0HIGH 8.8
TI-2026-25793 Protection mechanism failure in oneuptime CVSS 3.1CRITICAL 10.0
TI-2026-24835 OneUptime ClickHouse SQL Injection via Aggregate Query Parameters CVSS 3.1CRITICAL 10.0

See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences