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Vulnerability details: VCID-vn1a-guqa-5fc3
Vulnerability ID VCID-vn1a-guqa-5fc3
Aliases CVE-2026-42227
GHSA-756q-gq9h-fp22
Summary n8n has Public API Variables IDOR that Allows Cross-Project Secret Disclosure ## Impact An authenticated user with a valid API key scoped to `variable:list` could read variables from projects they are not a member of by supplying an arbitrary `projectId` query parameter to the public API variables endpoint. The handler queried the variables repository directly without enforcing project membership checks, bypassing the authorization-aware service layer used by the internal enterprise controller. If variables were misused to store sensitive information such as credentials or tokens, they should be rotated immediately. This issue only affects licensed enterprise or team deployments with multiple projects and the variables feature enabled. ## Patches The issue has been fixed in n8n versions 1.123.32, 2.17.4, and 2.18.1. Users should upgrade to one of these versions or later to remediate the vulnerability. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Restrict n8n access and API key issuance to fully trusted users only. - Audit existing project variables for sensitive values and rotate any secrets that may have been exposed. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Status Published
Exploitability 0.5
Weighted Severity 6.9
Risk 3.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-639 Authorization Bypass Through User-Controlled Key
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00038 https://api.first.org/data/v1/epss?cve=CVE-2026-42227
cvssv3.1 7.7 https://github.com/n8n-io/n8n
cvssv4 6.0 https://github.com/n8n-io/n8n
generic_textual MODERATE https://github.com/n8n-io/n8n
cvssv3.1 7.7 https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22
cvssv4 6 https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22
cvssv4 6.0 https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22
generic_textual MODERATE https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22
ssvc Track https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22
cvssv3.1 7.7 https://nvd.nist.gov/vuln/detail/CVE-2026-42227
cvssv4 6.0 https://nvd.nist.gov/vuln/detail/CVE-2026-42227
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-42227
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-42227
https://github.com/n8n-io/n8n
https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22
https://nvd.nist.gov/vuln/detail/CVE-2026-42227
GHSA-756q-gq9h-fp22 https://github.com/advisories/GHSA-756q-gq9h-fp22
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Found at https://github.com/n8n-io/n8n
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

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low

none

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none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://github.com/n8n-io/n8n
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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none

present

none

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passive

active

high

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none

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low

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Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Found at https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

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none

passive

active

high

low

none

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low

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Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-05T13:08:26Z/ Found at https://github.com/n8n-io/n8n/security/advisories/GHSA-756q-gq9h-fp22
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-42227
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-42227
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

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low

none

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Exploit Prediction Scoring System (EPSS)
Percentile 0.11846
EPSS Score 0.00038
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:53:14.227170+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-756q-gq9h-fp22/GHSA-756q-gq9h-fp22.json 38.6.0