{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59206","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-02T21:05:02.924Z","datePublished":"2026-07-09T15:30:28.166Z","dateUpdated":"2026-07-09T18:38:07.061Z"},"containers":{"cna":{"title":"n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration","problemTypes":[{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/n8n-io/n8n/security/advisories/GHSA-75qm-gp28-rcq9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-75qm-gp28-rcq9"},{"name":"https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4","tags":["x_refsource_MISC"],"url":"https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4"},{"name":"https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1","tags":["x_refsource_MISC"],"url":"https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1"}],"affected":[{"vendor":"n8n-io","product":"n8n","versions":[{"version":">= 2.28.0, < 2.28.1","status":"affected"},{"version":">= 2.0.0-rc.0, < 2.27.4","status":"affected"},{"version":"< 1.123.61","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-09T15:30:28.166Z"},"descriptions":[{"lang":"en","value":"n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1."}],"source":{"advisory":"GHSA-75qm-gp28-rcq9","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-09T18:37:56.384612Z","id":"CVE-2026-59206","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-09T18:38:07.061Z"}}]}}