Is CVE-2026-31271 actively exploited?

No active exploitation of CVE-2026-31271 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-31271 be exploited remotely?

Yes. CVE-2026-31271 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-31271?

CVE-2026-31271 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-31271

Published: April 7, 2026· Updated: Apr 9, 2026

9.8

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.8th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-31271 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.