Improper authorization in the /tequilapi/config/user endpoint of Mysterium Node from v1.21.1-rc0 before v1.36.0 allows an unauthenticated attacker to arbitrarily overwrite the node's configuration and achieve a full node takeover via a crafted POST request.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0044.

Exploitation poc

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a n/a affected
Version Status Constraints
n/a affected —

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/mysteriumnetwork/node/ cve-icon
https://github.com/mysteriumnetwork/node/commit/bc099fcaff59fee9c8a8f8e07ffff5b3c5df2bb9 cve-icon
https://github.com/sch8ill/CVE-2026-31309 cve-icon cve-icon
History

Sat, 25 Jul 2026 21:15:00 +0000

Type Values Removed Values Added
Title Improper Authorization in Mysterium Node API Allows Full Node Takeover

Thu, 23 Jul 2026 13:15:00 +0000

Type Values Removed Values Added
Title Improper Authorization in Mysterium Node Allows Unauthenticated Configuration Overwrite

Fri, 17 Jul 2026 09:15:00 +0000

Type Values Removed Values Added
Title Improper Authorization in Mysterium Node Allows Unauthenticated Configuration Overwrite

Thu, 16 Jul 2026 22:45:00 +0000

Type Values Removed Values Added
Title Improper Authorization Enables Full Node Takeover in Mysterium Node

Thu, 16 Jul 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

 cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 15 Jul 2026 08:30:00 +0000

Type Values Removed Values Added
Title Improper Authorization Enables Full Node Takeover in Mysterium Node

Tue, 14 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
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. Improper authorization in the /tequilapi/config/user endpoint of Mysterium Node from v1.21.1-rc0 before v1.36.0 allows an unauthenticated attacker to arbitrarily overwrite the node's configuration and achieve a full node takeover via a crafted POST request.
References

Mon, 13 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
Title Improper Authorization Enables Full Node Takeover

Mon, 13 Jul 2026 02:30:00 +0000

Type Values Removed Values Added
Title Improper Authorization Enables Full Node Takeover

Sun, 12 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Title Improper Authorization Allows Node Configuration Overwrite and Full Takeover

Fri, 10 Jul 2026 15:15:00 +0000

Type Values Removed Values Added
Title Improper Authorization Allows Node Configuration Overwrite and Full Takeover

Fri, 10 Jul 2026 01:30:00 +0000

Type Values Removed Values Added
Title Unauthorized configuration overwrite via /tequilapi/config/user endpoint
Weaknesses CWE-284

Thu, 09 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-862
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 09 Jul 2026 04:45:00 +0000

Type Values Removed Values Added
Title Unauthorized configuration overwrite via /tequilapi/config/user endpoint
Weaknesses CWE-284

Wed, 08 Jul 2026 22:15:00 +0000

Type Values Removed Values Added
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.
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-07-16T12:21:40.263Z

Reserved: 2026-03-09T00:00:00.000Z

Link: CVE-2026-31309

cve-icon Vulnrichment

Updated: 2026-07-09T14:31:10.556Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-25T21:00:14Z

Weaknesses