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CVE-2026-30957— OneUptime Synthetic Monitor RCE via exposed Playwright browser object

Quick assessment

Affected
OneUptime oneuptime
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OneUptime是OneUptime开源的一个全面的解决方案。用于监控和管理您的在线服务。 OneUptime 10.0.21之前版本存在安全漏洞，该漏洞源于Synthetic Monitors中未受信任代码执行不当，可能导致远程代码执行。

CVSS 10.0 · Critical EPSS 1.06% · P63
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I. Basic Information for CVE-2026-30957

Vulnerability Information
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Vulnerability Title
OneUptime Synthetic Monitor RCE via exposed Playwright browser object
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
暴露危险的方法或函数
Source: CVE Program / CVE List V5
Vulnerability Title
OneUptime 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OneUptime是OneUptime开源的一个全面的解决方案。用于监控和管理您的在线服务。 OneUptime 10.0.21之前版本存在安全漏洞，该漏洞源于Synthetic Monitors中未受信任代码执行不当，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
OneUptime oneuptime < 10.0.21 -

II. Public POCs for CVE-2026-30957

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11037 chars
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III. Intelligence Information for CVE-2026-30957

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Vendor Advisories for CVE-2026-30957 (1)

Vendor Pages for CVE-2026-30957 (1)

Same Patch Batch · OneUptime · 2026-03-10 · 4 CVEs total

CVE-2026-30956 10.0 CRITICAL OneUptime has authorization bypass via client‑controlled is-multi-tenant-query header
CVE-2026-30958 7.2 HIGH OneUptime: Path Traversal — Arbitrary File Read (No Auth)
CVE-2026-30959 OneUptime has WhatsApp Resend Verification Authorization Bypass

IV. Related Vulnerabilities

Same product: oneuptime
Same vendor: OneUptime
Same weakness: CWE-749

V. Comments for CVE-2026-30957

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