CVE-2026-41495

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 83% 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
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

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

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to version 2.47.11, when n8n-mcp runs in HTTP transport mode, incoming requests to the POST /mcp endpoint had their request metadata written to server logs regardless of the authentication outcome. In deployments where logs are collected, forwarded to external systems, or viewable outside the request trust boundary (shared log storage, SIEM pipelines, support/ops access), this can result in disclosure of: bearer tokens from the Authorization header, per-tenant API keys from the, x-n8n-key header in multi-tenant setups, JSON-RPC request payloads sent to the MCP endpoint. Access control itself was not bypassed — unauthenticated requests were correctly rejected with 401 Unauthorized — but sensitive values from those rejected requests could still be persisted in logs. This issue has been patched in version 2.47.11.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
—
EPSS
17.1%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 14, 2026

Advisory Details (2)

Auto-updated Jun 16, 2026
Patch available. Sources: github_release, github.
github Patch Available

Sensitive Request Data Logged on Unauthorized /mcp Requests · Advisory · czlonkowski/n8n-mcp · GitHub

https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-pfm2-2mhg-8wpx
github_release Patch Available

Release v2.47.11

Patch available: czlonkowski/n8n-mcp v2.47.11

https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.47.11

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
n8n-mcp—2.47.11—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 34× 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. 2026-07-22 14:08 UTCEPSS rescore
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  7. 2026-07-16 04:19 UTCOSV refresh
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  1. 2026-06-30 23:22 UTCEPSS rescore
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  59. 2026-05-20 22:38 UTCEPSS rescore
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  61. 2026-05-20 13:32 UTCEG score recompute
  62. 2026-05-20 11:22 UTCEPSS rescore
  63. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-41495?
CVE-2026-41495 is a medium vulnerability published on May 8, 2026. n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to version 2.47.11, when n8n-mcp runs in HTTP transport mode, incoming requests to the POST /mcp endpoint had their request metadata written to server logs regardless of the…
When was CVE-2026-41495 disclosed?
CVE-2026-41495 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41495 actively exploited?
CVE-2026-41495 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41495?
CVE-2026-41495 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-41495?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41495, 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.

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