How severe is CVE-2026-27728?

CVE-2026-27728 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-27728 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27728?

CVE-2026-27728 affects Hackerbay Oneuptime. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27728?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-27728 have an EU (EUVD) identifier?

Yes. CVE-2026-27728 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8684.

When was CVE-2026-27728 published?

CVE-2026-27728 was published on 2026-02-25 and last updated on 2026-06-17.

CVE-2026-27728

CVE-2026-27728 is a critical-severity vulnerability in Hackerbay Oneuptime with a CVSS 3.x base score of 9.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8684
Weakness: CWE-78
Affected product: Hackerbay Oneuptime
Published: 2026-02-25
Last modified: 2026-06-17

Description

OneUptime is a solution for monitoring and managing online services. Prior to version 10.0.7, an OS command injection vulnerability in `NetworkPathMonitor.performTraceroute()` allows any authenticated project user to execute arbitrary operating system commands on the Probe server by injecting shell metacharacters into a monitor's destination field. Version 10.0.7 fixes the vulnerability.

Frequently asked questions

What is CVE-2026-27728?: OneUptime is a solution for monitoring and managing online services. Prior to version 10.0.7, an OS command injection vulnerability in `NetworkPathMonitor.performTraceroute()` allows any authenticated project user to execute arbitrary operating system commands on the Probe server by injecting shell metacharacters into a monitor's destination field. Version 10.0.7 fixes the vulnerability.
How severe is CVE-2026-27728?: CVE-2026-27728 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-27728 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27728?: CVE-2026-27728 affects Hackerbay Oneuptime. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27728?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-27728 have an EU (EUVD) identifier?: Yes. CVE-2026-27728 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8684.
When was CVE-2026-27728 published?: CVE-2026-27728 was published on 2026-02-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hackerbay:oneuptime:*:*:*:*:*:*:*:*

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