CVE-2026-27574

CRITICAL EPSS 39.3%
Published Feb 21, 20264mo ago · Modified Jun 17, 20261w ago
9.9 CVSS 3.1
Critical
Find Similar
Published Feb 21, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

Description

OneUptime is a solution for monitoring and managing online services. In versions 9.5.13 and below, custom JavaScript monitor feature uses Node.js's node:vm module (explicitly documented as not a security mechanism) to execute user-supplied code, allowing trivial sandbox escape via a well-known one-liner that grants full access to the underlying process. Because the probe runs with host networking and holds all cluster credentials (ONEUPTIME_SECRET, DATABASE_PASSWORD, REDIS_PASSWORD, CLICKHOUSE_PASSWORD) in its environment variables, and monitor creation is available to the lowest role (ProjectMember) with open registration enabled by default, any anonymous user can achieve full cluster compromise in about 30 seconds. This issue has been fixed in version 10.0.5.

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
39.3% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-94 Improper Control of Generation of Code (Code Injection) Injection

Affected Products 1

VendorProductVersionRange
hackerbayoneuptime* <10.0.5

References 2

  • github.com https://github.com/OneUptime/oneuptime/commit/7f9ed4d43945574702a26b7c206e38cc344fe427
    Patch
  • github.com https://github.com/OneUptime/oneuptime/security/advisories/GHSA-v264-xqh4-9xmm
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/OneUptime/oneuptime/commit/7f9ed4d43945574702a26b7c206e38cc344fe427
    Patch