CVE-2026-15521

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory (severity: LOW) published 2026-07-13. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
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.

A vulnerability was identified in makafeli n8n-workflow-builder up to 0.11.0. Affected is an unknown function of the file build/server.cjs of the component update_node_from_file. The manipulation of the argument filePath leads to path traversal. An attack has to be approached locally. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
5.3
EG Score
5.3(high)
EPSS
3.5%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Jul 13, 2026
No patch confirmed yet.
generic

GitHub - makafeli/n8n-workflow-builder: AI assistant integration for n8n workflow automation through Model Context Protocol (MCP). Connect Claude Desktop, ChatGPT, and other AI assistants to n8n for natural language workflow management. · GitHub

https://github.com/makafeli/n8n-workflow-builder/
generic

[Vulnerability] Arbitrary Local Text File Read via `update_node_from_file` Persists File Content into n8n Workflow · Issue #28 · makafeli/n8n-workflow-builder · GitHub

https://github.com/makafeli/n8n-workflow-builder/issues/28

Vendor Advisories for CVE-2026-15521(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 12× in last 7d / 12× 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 16:57 UTCEPSS rescore
  2. 2026-07-15 16:23 UTCNVD updateCVSS v4 → 1.9
  3. 2026-07-15 15:54 UTCMITRE cvelistV5CVSS v4 → 4.8
  4. 2026-07-15 06:12 UTCEG score recompute
  5. 2026-07-15 06:12 UTCGHSA enrichment
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-14 04:00 UTCEG score recompute
  8. 2026-07-14 04:00 UTCGHSA enrichment
  9. 2026-07-13 22:30 UTCEPSS rescore
  10. 2026-07-13 02:18 UTCNVD updateCVSS v4 → 1.9
  11. 2026-07-13 01:48 UTCEG score recompute
  12. 2026-07-13 01:47 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-15521?
CVE-2026-15521 is a medium vulnerability published on July 13, 2026. A vulnerability was identified in makafeli n8n-workflow-builder up to 0.11.0. Affected is an unknown function of the file build/server.cjs of the component updatenodefrom_file. The manipulation of the argument filePath leads to path traversal. An attack has to be approached locally. The exploit is…
When was CVE-2026-15521 disclosed?
CVE-2026-15521 was first published in the National Vulnerability Database on July 13, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15521 actively exploited?
CVE-2026-15521 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-15521?
CVE-2026-15521 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-15521?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15521, 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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