CVE•Published 2026-06-30•Modified 2026-07-02•0 articles on news•4 live references•NVD data

CVE-2026-56777N8n · N8n

Vulnerability data via NVD (ingested)

CVSS v3.1

5.0

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

EPSS percentile

Exploit Prediction Scoring System · top 83% of all CVEs

Weaknesses (CWE)

CWE-184Incomplete List of Disallowed Inputs

Description

n8n before 2.25.7 and 2.26.x before 2.26.2 contains an abstract syntax tree (AST) security validator bypass in the Python Code node. An authenticated user with permission to create or modify workflows containing a Python Code node can bypass the validator and access the task executor module namespace. The issue only affects self-hosted instances where the Python Task Runner is enabled; where N8N_BLOCK_RUNNER_ENV_ACCESS is configured to allow it, this can disclose environment variables accessible to the task runner process.

Timeline

Published 2026-06-30

Modified 2026-07-02

External references

NVD MITRE Exploit-DB VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common). Live host counts are a Premium feature.

Shodan · vuln tag

vuln:CVE-2026-56777

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"N8n N8n"

All exposed N8n N8n instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"N8n"

HTTP body or banner mentions "N8n" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-56777