CVE-2026-31309

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
UNKNOWN
---
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
References
https://github.com/mysteriumnetwork/node/
https://github.com/mysteriumnetwork/node/blob/1.35.5/tequilapi/tequil/routes.go#L26
https://github.com/mysteriumnetwork/node/commit/83051199cd641dd4ed9057b958e5616df1309f19
https://github.com/mysteriumnetwork/node/commit/bc099fcaff59fee9c8a8f8e07ffff5b3c5df2bb9
https://github.com/mysteriumnetwork/node/releases/tag/1.35.5
https://github.com/mysteriumnetwork/node/releases/tag/1.36.0
https://github.com/sch8ill/CVE-2026-31309