Improper Authorization in Mysterium Node Configuration

Publication date: 2026-07-08

Last updated on: 2026-07-08

Assigner: MITRE

Description

Improper authorization in the /tequilapi/config/user endpoint of Mysterium Node before v1.36.0 allows unauthenticated attackers to arbitrarily overwrite the node's configuration and achieve a full node takeover via supplying a crafted POST request.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-08

Last Modified

2026-07-08

Generated

2026-07-09

AI Q&A

2026-07-09

EPSS Evaluated

N/A

NVD

CVE-2026-31309

Affected Vendors & Products

Vendor	Product	Version / Range
mysterium_network	mysterium_node	1.36.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is an improper authorization issue in the /tequilapi/config/user endpoint of Mysterium Node versions before v1.36.0. It allows unauthenticated attackers to send a specially crafted POST request to arbitrarily overwrite the node's configuration.

By exploiting this, an attacker can achieve a full takeover of the node.

Impact Analysis

The impact of this vulnerability is severe because it allows an unauthenticated attacker to fully take over the affected Mysterium Node.

Arbitrary overwriting of the node's configuration.
Complete control over the node by the attacker.

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