CVE-2026-31309

State: Published
Severity: 9.8 Critical
Published: Jul 8, 2026
Updated: Jul 16, 2026
Reserved: Mar 9, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://github.com/mysteriumnetwork/node/
https://github.com/mysteriumnetwork/node/commit/bc099fcaff59fee9c8a8f8e07ffff5b3c5df2bb9
https://github.com/sch8ill/CVE-2026-31309

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