CVE-2026-31309

HIGH

Mysterium Node < 1.36.0 - Unauthenticated Configuration Overwrite and Node Takeover via /tequilapi/config/user Endpoint

Title source: llm

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-31309. PoCs published by Sch8ill.

AI-analyzed exploit summary The repository describes a broken access control vulnerability in Mysterium Node's `/tequilapi/config/user` endpoint, allowing unauthenticated attackers to overwrite node configuration via a crafted POST request. However, it lacks a functional PoC (e.g., `config.json` template or exploit code) and only provides a basic `curl` command skeleton.

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.

Exploits (1)

github STUB

by Sch8ill · poc

https://github.com/Sch8ill/CVE-2026-31309

View Code ZIP pw:eip

The repository describes a broken access control vulnerability in Mysterium Node's `/tequilapi/config/user` endpoint, allowing unauthenticated attackers to overwrite node configuration via a crafted POST request. However, it lacks a functional PoC (e.g., `config.json` template or exploit code) and only provides a basic `curl` command skeleton.

Classification

Stub 95%

Attack Type

Auth Bypass

Complexity

Trivial

Reliability

Reliable

Target: Mysterium Node before version 1.36.0

No auth needed

Prerequisites: Network access to the target Mysterium Node's `/tequilapi/config/user` endpoint · Knowledge of valid configuration parameters to overwrite

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1078 - Valid Accounts

mistral-large-3 · analyzed Jul 09, 2026 Full analysis →