What’s Vulnerable › Vulnerabilities

CVE-2026-31309

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-08 · updated 2026-07-16
• Weakness: CWE-862

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.

References

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

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