CVE-2026-103255

CRITICALPre-NVD 9.09.0—
EchelonGraph scoreHIGH confidence

Score 9.0 from GitHub Security Advisory (severity: HIGH) published 2026-10-01. A secondary CVSS source baseline 9.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 9.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a path traversal vulnerability in the Supabase node where the tableId parameter is inserted into request paths without validation. Attackers can exploit workflows binding tableId to untrusted input to traverse to Auth and Storage APIs using the administrative serviceRole key, bypassing Row Level Security and enabling unauthorized data access and modification.

CVSS v3
9.0
EG Score
9.0CRITICALhigh confidence
EG Risk
41
EG Risk 41/100CISA SSVC

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
Severity90% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 1, 2026

Last Modified

October 1, 2026

Advisory Details (2)

Auto-updated Oct 1, 2026
Patch available. Sources: github.
generic

n8n before 1.123.80, 2.39.6, and 2.40.1 Path Traversal and Query Injection via Supabase | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-path-traversal-and-query-injection-via-supabase
github Patch Available

Path Traversal and Query Injection via the Supabase Node Table Name · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-rqch-9jrh-cr8w

Vendor Advisories for CVE-2026-103255(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 / 29× 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. 2026-10-04 11:10 UTCGHSA enrichment
  2. 2026-10-04 07:16 UTCGHSA enrichment
  3. 2026-10-04 03:22 UTCGHSA enrichment
  4. 2026-10-03 23:29 UTCGHSA enrichment
  5. 2026-10-03 19:32 UTCGHSA enrichment
  6. 2026-10-03 15:38 UTCEG score recompute
  7. 2026-10-03 15:38 UTCGHSA enrichment
  8. 2026-10-03 14:25 UTCEPSS rescore
  9. 2026-10-03 11:42 UTCGHSA enrichment
  10. 2026-10-03 07:47 UTCGHSA enrichment
  11. 2026-10-03 03:49 UTCGHSA enrichment
  12. 2026-10-02 23:55 UTCGHSA enrichment
  13. 2026-10-02 19:58 UTCEG score recompute
  14. 2026-10-02 19:58 UTCGHSA enrichment
  15. 2026-10-02 16:03 UTCGHSA enrichment
  16. 2026-10-02 12:09 UTCGHSA enrichment
  17. 2026-10-02 08:14 UTCGHSA enrichment
  18. 2026-10-02 04:18 UTCGHSA enrichment
  19. 2026-10-02 00:23 UTCGHSA enrichment
  20. 2026-10-01 20:29 UTCEG score recompute
  21. 2026-10-01 20:29 UTCGHSA enrichment
  22. 2026-10-01 19:31 UTCEG score recompute
  23. 2026-10-01 19:31 UTCGHSA enrichment
  24. 2026-10-01 19:15 UTCGHSA enrichment
  25. 2026-10-01 15:20 UTCEG score recompute
Show 4 more
  1. 2026-10-01 15:20 UTCGHSA enrichment
  2. 2026-10-01 11:27 UTCEG score recompute
  3. 2026-10-01 10:51 UTCEG score recompute
  4. 2026-10-01 10:50 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-103255?
CVE-2026-103255 is a critical vulnerability published on October 1, 2026. n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a path traversal vulnerability in the Supabase node where the tableId parameter is inserted into request paths without validation. Attackers can exploit workflows binding tableId to untrusted input to…
When was CVE-2026-103255 disclosed?
CVE-2026-103255 was first published on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-103255 actively exploited?
CVE-2026-103255 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103255?
CVE-2026-103255 has a CVSS base score of 9.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-103255?
A fix for CVE-2026-103255 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-103255 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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