OneUptime Affected by Unsandboxed Code Execution in Probe Allows Any Project Member to Achieve RCE

published 2026-03-07 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-10420 , GHSA-h343-gg57-2q67

cvss: 10.0; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 39%
public exploits: 0; none known

OneUptime is a solution for monitoring and managing online services. Prior to 10.0.18, OneUptime allows project members to run custom Playwright/JavaScript code via Synthetic Monitors to test websites. However, the system executes this untrusted user code inside the insecure Node.js vm module. By leveraging a standard prototype-chain escape (this.constructor.constructor), an attacker can bypass the sandbox, gain access to the underlying Node.js process object, and execute arbitrary system commands (RCE) on the oneuptime-probe container. Furthermore, because the probe holds database/cluster credentials in its environment variables, this directly leads to a complete cluster compromise. This vulnerability is fixed in 10.0.18.

Patch / fix

fixed in 2

npm @oneuptime/common 10.0.18
hackerbay oneuptime 10.0.18

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 8 mo ago (2026-03-10)

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/OneUptime/oneuptime/security/advisories/GHSA-h343-gg57-2q67 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	10.0	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
GitHub	3.1	9.9	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
npm	@oneuptime/common	<10.0.18	10.0.18

Affected products

OneUptime oneuptime

Classification

Weakness

CWE-94 Improper Control of Generation of Code

References

github.com /OneUptime/oneuptime/security/advisories/GHSA-h343-gg57-2q67
exploit, web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-30887
advisory
github.com /OneUptime/oneuptime
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary