How serious is CVE-2026-27574?

This vulnerability has a CVSS score of 9.9 out of 10, classified as CRITICAL severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-27574?

Yes, proof-of-concept exploit code for CVE-2026-27574 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-27574?

CVE-2026-27574 affects hackerbay oneuptime. Check the full CVE details for specific version information.

How do I fix CVE-2026-27574?

To remediate CVE-2026-27574, check for security patches from hackerbay. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-27574

Critical

|9.9

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

An attacker can gain complete control over the server running OneUptime, accessing sensitive credentials and data, simply by executing a short piece of code. This is possible because the system allows any anonymous user to create custom monitors, and the vulnerable version runs with high privileges, making it easy to exploit.

Technical 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 Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

Confidentiality ImpactHigh

Integrity ImpactHigh

Availability ImpactHigh

ScopeChanged

Vector String

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$14,000($5K-$15K)

Vendor Response

Grade APatched in 2 days

Quick Information

Published

Feb 21, 2026

about 2 months ago

Last Modified

Feb 23, 2026

about 1 month ago

Vendor

hackerbay

Product

oneuptime