CVE-2026-86075

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 73% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the OAuth Dynamic Client Registration endpoint bounded redirect_uris but accepted arbitrarily large client_name and grant_types values. An unauthenticated remote caller could repeatedly persist oversized values in oauth_clients and exhaust database storage. The affected validation is in packages/cli/src/modules/oauth-server/oauth-server.service.ts, including MAX_CLIENT_NAME_LENGTH and MAX_GRANT_TYPES. This issue is fixed in versions 2.37.7 and 2.38.2.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 11, 2026

Advisory Details (3)

Auto-updated Sep 8, 2026
Patch available. Sources: github, github_release.
github_release Patch Available

[email protected]

Patch available: n8n-io/n8n [email protected] (pre-release)

https://github.com/n8n-io/n8n/releases/tag/[email protected]
github_release Patch Available

[email protected]

Patch available: n8n-io/n8n [email protected]

https://github.com/n8n-io/n8n/releases/tag/[email protected]
github Patch Available

Unauthenticated Persistent Storage Exhaustion via OAuth Dynamic Client Registration Endpoint · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-hh89-3r9w-qj3j

Vendor Advisories for CVE-2026-86075(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
n8n—2.38.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 23× 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. 2026-09-18 22:11 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-17 20:16 UTCEG score recompute
  4. 2026-09-17 19:32 UTCEPSS rescore
  5. 2026-09-16 15:15 UTCEG score recompute
  6. 2026-09-16 14:09 UTCEPSS rescore
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 13:19 UTCEG score recompute
  9. 2026-09-15 03:12 UTCEPSS rescore
  10. 2026-09-15 03:12 UTCEPSS rescore
  11. 2026-09-13 22:26 UTCEG score recompute
  12. 2026-09-12 20:31 UTCEG score recompute
  13. 2026-09-11 18:35 UTCEG score recompute▼ 1.20
  14. 2026-09-11 18:34 UTCNVD updateCVSS v3 → 7.5
  15. 2026-09-11 14:53 UTCEPSS rescore
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 11:42 UTCEG score recompute
  18. 2026-09-10 09:46 UTCEG score recompute
  19. 2026-09-09 17:31 UTCEG score recompute
  20. 2026-09-09 16:46 UTCEG score recompute
  21. 2026-09-08 22:28 UTCEG score recompute
  22. 2026-09-08 21:41 UTCEG score recompute
  23. 2026-09-08 21:39 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-86075?
CVE-2026-86075 is a high vulnerability published on September 8, 2026. n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the OAuth Dynamic Client Registration endpoint bounded redirecturis but accepted arbitrarily large clientname and granttypes values. An unauthenticated remote caller could repeatedly persist oversized values in…
When was CVE-2026-86075 disclosed?
CVE-2026-86075 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86075 actively exploited?
CVE-2026-86075 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 72.6% of all scored CVEs.
What is the CVSS score of CVE-2026-86075?
CVE-2026-86075 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-86075?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86075, 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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