CVE-2026-88391 Northstar - Remote Code Execution

Northstar <= 9.1.1 contains a remote code execution caused by exposed H2 Console without authentication and default credentials, letting network-reachable attackers execute arbitrary system commands pre-authentication.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.36% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
5 October 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Update to the latest version that disables or properly secures the H2 Console.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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