CVE-2026-31309

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this weekElevated
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
24.5%
KEV
Not listed

Published

July 8, 2026

Last Modified

July 14, 2026

Advisory Details (6)

Auto-updated Jul 9, 2026
Patch available. Sources: github_commit, github_release.
generic

GitHub - Sch8ill/CVE-2026-31309: Broken Access Control in Mysterium Node TequilAPI before v1.36.0 · GitHub

https://github.com/sch8ill/CVE-2026-31309
github_release Patch Available

1.35.5

Patch available: mysteriumnetwork/node 1.35.5 (pre-release)

https://github.com/mysteriumnetwork/node/releases/tag/1.35.5
github_commit

commit bc099fcaff59 (mysteriumnetwork/node)

Fix landed in mysteriumnetwork/node commit bc099fcaff59 — awaiting tagged release

https://github.com/mysteriumnetwork/node/commit/bc099fcaff59fee9c8a8f8e07ffff5b3c5df2bb9
github_commit

commit 83051199cd64 (mysteriumnetwork/node)

Fix landed in mysteriumnetwork/node commit 83051199cd64 — awaiting tagged release

https://github.com/mysteriumnetwork/node/commit/83051199cd641dd4ed9057b958e5616df1309f19
generic

node/tequilapi/tequil/routes.go at 1.35.5 · mysteriumnetwork/node · GitHub

https://github.com/mysteriumnetwork/node/blob/1.35.5/tequilapi/tequil/routes.go#L26
generic

GitHub - mysteriumnetwork/node: Mysterium Network Node - official implementation of distributed VPN network (dVPN) protocol · GitHub

https://github.com/mysteriumnetwork/node/

Vendor Advisories for CVE-2026-31309(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 29× in last 7d / 32× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 23:13 UTCEG score recompute
  2. 2026-07-15 23:13 UTCGHSA enrichment
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 16:57 UTCEPSS rescore
  5. 2026-07-15 11:42 UTCEG score recompute
  6. 2026-07-15 11:42 UTCGHSA enrichment
  7. 2026-07-15 02:00 UTCEPSS rescore
  8. 2026-07-15 02:00 UTCEPSS rescore
  9. 2026-07-15 00:10 UTCEG score recompute
  10. 2026-07-15 00:09 UTCGHSA enrichment
  11. 2026-07-14 12:37 UTCEG score recompute
  12. 2026-07-14 12:36 UTCGHSA enrichment
  13. 2026-07-14 01:05 UTCEG score recompute
  14. 2026-07-14 01:05 UTCGHSA enrichment
  15. 2026-07-13 22:30 UTCEPSS rescore
  16. 2026-07-13 13:33 UTCEG score recompute
  17. 2026-07-13 13:33 UTCGHSA enrichment
  18. 2026-07-13 06:13 UTCEPSS rescore
  19. 2026-07-13 06:13 UTCEPSS rescore
  20. 2026-07-13 02:02 UTCEG score recompute
  21. 2026-07-13 02:02 UTCGHSA enrichment
  22. 2026-07-12 14:30 UTCEG score recompute
  23. 2026-07-12 14:30 UTCGHSA enrichment
  24. 2026-07-12 05:46 UTCEPSS rescore
  25. 2026-07-12 02:58 UTCEG score recompute▲ 7.50
Show 7 more
  1. 2026-07-12 02:58 UTCGHSA enrichment
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-09 19:10 UTCEPSS rescore
  4. 2026-07-09 15:35 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  5. 2026-07-08 22:53 UTCNVD update
  6. 2026-07-08 22:04 UTCEG score recompute
  7. 2026-07-08 22:04 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-31309?
CVE-2026-31309 is a high vulnerability published on July 8, 2026. 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.
When was CVE-2026-31309 disclosed?
CVE-2026-31309 was first published in the National Vulnerability Database on July 8, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31309 actively exploited?
CVE-2026-31309 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31309?
CVE-2026-31309 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-31309?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31309, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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