CVE-2026-103260

MEDIUMPre-NVD 4.04.0—
EchelonGraph scoreHIGH confidence

Score 4.0 from GitHub Security Advisory published 2026-10-01. A secondary CVSS source baseline 4.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
4.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 4.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain an approval bypass vulnerability in the Send and Wait node's Approve Within Chat mode. Attackers can submit resume requests without verification of the requester's identity or approval permissions, allowing unauthenticated users to advance waiting executions and trigger guarded actions.

CVSS v3
4.0
EG Score
4.0MEDIUMhigh confidence
EG Risk
18
EG Risk 18/100CISA 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
Severity40% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 2.39.6 and 2.40.x before 2.40.1 Approval Bypass via Send and Wait Node | Advisories | VulnCheck

https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-approval-bypass-via-send-and-wait-node
github Patch Available

Approval Bypass in the Send and Wait Node's Approve Within Chat Mode · Advisory · n8n-io/n8n · GitHub

https://github.com/n8n-io/n8n/security/advisories/GHSA-342v-gmh6-738j

Vendor Advisories for CVE-2026-103260(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 13× in last 7d / 13× 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 07:43 UTCEG score recompute
  2. 2026-10-04 07:43 UTCGHSA enrichment
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-03 09:58 UTCEG score recompute
  5. 2026-10-03 09:57 UTCGHSA enrichment
  6. 2026-10-02 12:09 UTCGHSA enrichment
  7. 2026-10-01 14:21 UTCEG score recompute
  8. 2026-10-01 14:21 UTCGHSA enrichment
  9. 2026-10-01 13:41 UTCEG score recompute
  10. 2026-10-01 13:41 UTCGHSA enrichment
  11. 2026-10-01 11:27 UTCEG score recompute
  12. 2026-10-01 10:51 UTCEG score recompute
  13. 2026-10-01 10:50 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-103260?
CVE-2026-103260 is a medium vulnerability published on October 1, 2026. n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain an approval bypass vulnerability in the Send and Wait node's Approve Within Chat mode. Attackers can submit resume requests without verification of the requester's identity or approval permissions, allowing unauthenticated users to advance…
When was CVE-2026-103260 disclosed?
CVE-2026-103260 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-2026-103260 actively exploited?
CVE-2026-103260 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103260?
CVE-2026-103260 has a CVSS base score of 4.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-103260?
A fix for CVE-2026-103260 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-103260 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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