{"data":{"id":"890bde78-7142-480f-912f-4fabe278c0e3","title":"GHSA-vpgc-2f6g-7w7x: n8n Has Authorization Bypass in OAuth Callback via N8N_SKIP_AUTH_ON_OAUTH_CALLBACK","summary":"GHSA-vpgc-2f6g-7w7x affects n8n instances that explicitly set N8N_SKIP_AUTH_ON_OAUTH_CALLBACK to true. With that setting, the OAuth callback handler skips ownership verification of the OAuth state parameter, so an attacker can trick a victim into completing an OAuth flow against an attacker-controlled credential object. The victim's OAuth tokens are then stored in the attacker's credential, letting the attacker run workflows in the victim's name. The default configuration is not affected.","solution":"Fixed in n8n version 2.8.0; upgrade to 2.8.0 or later. If upgrading is not immediately possible, avoid enabling N8N_SKIP_AUTH_ON_OAUTH_CALLBACK=true unless strictly required and restrict instance access to fully trusted users only. The source notes these workarounds do not fully remediate the risk and are short-term measures only.","labels":["security"],"sourceUrl":"https://github.com/advisories/GHSA-vpgc-2f6g-7w7x","publishedAt":"2026-03-25T21:57:55.000Z","cveId":"CVE-2026-33720","cweIds":null,"cvssScore":null,"cvssSeverity":"medium","severity":"medium","attackType":["other"],"issueType":"vulnerability","affectedPackages":["n8n@< 2.8.0 (fixed: 2.8.0)"],"affectedPackageNames":["n8n"],"affectedPackageRefs":["npm:n8n"],"affectedVendors":[],"affectedVendorsRaw":["n8n"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":"unknown","epssScore":0.00183,"epssCheckedAt":"2026-11-09T18:09:52.751Z","kevDateAdded":null,"advisoryAliases":["GHSA-vpgc-2f6g-7w7x"],"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":true,"disclosureDate":"2026-03-25T21:57:55.000Z","fixReleasedAt":"2026-02-10T11:05:40.514Z","daysToFix":-43,"fixCheckedAt":"2026-10-29T21:39:35.904Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality","integrity"],"aiComponentTargeted":"plugin","llmSpecific":false,"classifierConfidence":0.8,"researchCategory":null,"atlasIds":null,"fixes":[{"ecosystem":"npm","name":"n8n","fixedVersion":"2.8.0","matchedVersion":"2.8.0","fixReleasedAt":"2026-02-10T11:05:40.514Z","daysToFix":-43,"match":"ecosystem","source":"tracked","status":"found","checkedAt":"2026-10-29T21:39:35.754Z"}]}}