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Java CVE-2026-31271

| EUVD-2026-19765 CRITICAL
Authentication Bypass Using an Alternate Path or Channel (CWE-288)
2026-04-07 mitre GHSA-q8pq-mm5c-rq9h
9.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
EUVD ID Assigned
Apr 07, 2026 - 18:00 euvd
EUVD-2026-19765
Analysis Generated
Apr 07, 2026 - 18:00 vuln.today
CVE Published
Apr 07, 2026 - 00:00 nvd
CRITICAL 9.8

DescriptionNVD

megagao production_ssm v1.0 contains an authorization bypass vulnerability in the user addition functionality. The insert() method in UserController.java lacks authentication checks, allowing unauthenticated attackers to create super administrator accounts by directly accessing the /user/insert endpoint. This leads to complete system compromise.

AnalysisAI

Unauthenticated account creation bypass in megagao production_ssm v1.0 allows remote attackers to create super administrator accounts via direct API access to /user/insert endpoint. The UserController.java insert() method processes account creation requests without authentication enforcement (CVSS vector PR:N confirms unauthenticated access). …

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RemediationAI

Within 24 hours: Identify all systems running megagao production_ssm v1.0 and isolate them from production networks or immediately decommission if not business-critical. Within 7 days: Contact megagao for patch status and timeline; implement network-based access controls restricting /user/insert endpoint to authorized IP ranges only as interim mitigation. …

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CVE-2026-31271 vulnerability details – vuln.today

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