CVE-2026-56359

n8n before 2.8.0 contains a cross-site scripting vulnerability in the credential management flow where authenticated users can inject malicious JavaScript URLs into OAuth2 credential Authorization URL fields. Attackers can craft malicious credentials and trick victims into clicking the OAuth authorization button, executing arbitrary scripts in their browser session with the victim's privileges.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/security/advisories/GHSA-364x-8g5j-x2pr	Mitigation Vendor Advisory
https://www.vulncheck.com/advisories/n8n-cross-site-scripting-in-credential-management-oauth2-authorization-url	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n8n:n8n::::::node.js::*
	cpe:2.3:a:n8n:n8n::::::node.js::*

History

08 Jul 2026, 19:34

Type	Values Removed	Values Added
CPE		cpe:2.3:a:n8n:n8n::::::node.js::*
First Time		N8n N8n n8n
References	~~() https://github.com/n8n-io/n8n/security/advisories/GHSA-364x-8g5j-x2pr -~~	() https://github.com/n8n-io/n8n/security/advisories/GHSA-364x-8g5j-x2pr - Mitigation, Vendor Advisory
References	~~() https://www.vulncheck.com/advisories/n8n-cross-site-scripting-in-credential-management-oauth2-authorization-url -~~	() https://www.vulncheck.com/advisories/n8n-cross-site-scripting-in-credential-management-oauth2-authorization-url - Third Party Advisory

08 Jul 2026, 14:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-08 14:17

Updated : 2026-07-09 15:16

NVD link : CVE-2026-56359

Mitre link : CVE-2026-56359

CVE.ORG link : CVE-2026-56359

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

{"id": "CVE-2026-56359", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56359", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-09T13:35:54.521387Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.3}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 4.8, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "ACTIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "LOW", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "disclosure@vulncheck.com", "affectedData": [{"vendor": "n8n", "product": "n8n", "versions": [{"status": "affected", "version": "0", "lessThan": "2.8.0", "versionType": "semver"}, {"status": "unaffected", "version": "2.8.0", "versionType": "semver"}], "packageURL": "pkg:npm/n8n", "defaultStatus": "unaffected"}, {"vendor": "n8n", "product": "n8n", "versions": [{"status": "affected", "version": "0", "lessThan": "2.6.4", "versionType": "semver"}, {"status": "unaffected", "version": "2.6.4", "versionType": "semver"}], "packageURL": "pkg:npm/n8n", "defaultStatus": "unaffected"}]}], "published": "2026-07-08T14:17:16.620", "references": [{"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-364x-8g5j-x2pr", "tags": ["Mitigation", "Vendor Advisory"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/n8n-cross-site-scripting-in-credential-management-oauth2-authorization-url", "tags": ["Third Party Advisory"], "source": "disclosure@vulncheck.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "n8n before 2.8.0 contains a cross-site scripting vulnerability in the credential management flow where authenticated users can inject malicious JavaScript URLs into OAuth2 credential Authorization URL fields. Attackers can craft malicious credentials and trick victims into clicking the OAuth authorization button, executing arbitrary scripts in their browser session with the victim's privileges."}], "lastModified": "2026-07-09T15:16:38.060", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "8661E45D-0BF8-4F11-BFCB-505C959E7C16", "versionEndExcluding": "2.6.4"}, {"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "3A4A06A3-0B6F-44A2-B732-4C55B36451FC", "versionEndExcluding": "2.8.0", "versionStartIncluding": "2.7.0"}], "operator": "OR"}]}], "sourceIdentifier": "disclosure@vulncheck.com"}