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CVE-2026-65594

n8n before 2.29.8 and 2.30.x before 2.30.1 (affected from 2.27.0, when the OAuth 2.1 consent and token-issuance flow was introduced) does not verify that the authenticated user has access to the workflow referenced as the OAuth resource. On instances with at least one active MCP Server Trigger workflow configured with n8n OAuth2 authentication, a member-level user can register an OAuth client, self-approve consent for another user's workflow, and obtain a valid token. The workflow then runs in t
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b9f732aa3cfbaf9fe04b44295c8087438f8941a3191785d230c418486349082c
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","product":"n8n","vendor":"n8n-io","versions":[{"lessThan":"2.30.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.30.1","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9e5657abec591f0a71d7502b19d4e7b1a253f40238d1b8db87181abda57cc3b0 · sha256:b3ba5bf9c57cfbf6… · /containers/cna/affected/0

{"defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","product":"n8n","vendor":"n8n-io","versions":[{"lessThan":"2.29.8","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.29.8","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9e5657abec591f0a71d7502b19d4e7b1a253f40238d1b8db87181abda57cc3b0 · sha256:b3ba5bf9c57cfbf6… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","product":"n8n","vendor":"n8n-io","versions":[{"lessThan":"2.30.1","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.30.1","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9e5657abec591f0a71d7502b19d4e7b1a253f40238d1b8db87181abda57cc3b0 · sha256:b3ba5bf9c57cfbf6… · /containers/cna/affected/0
{"defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","product":"n8n","vendor":"n8n-io","versions":[{"lessThan":"2.29.8","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.29.8","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9e5657abec591f0a71d7502b19d4e7b1a253f40238d1b8db87181abda57cc3b0 · sha256:b3ba5bf9c57cfbf6… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"LOW","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:H/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9e5657abec591f0a71d7502b19d4e7b1a253f40238d1b8db87181abda57cc3b0 · sha256:b3ba5bf9c57cfbf6… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-863","description":"Incorrect Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9e5657abec591f0a71d7502b19d4e7b1a253f40238d1b8db87181abda57cc3b0 · sha256:b3ba5bf9c57cfbf6… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"GitHub Security Advisory (GHSA-q5xf-xhwf-cwqf)","tags":["vendor-advisory"],"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-q5xf-xhwf-cwqf"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9e5657abec591f0a71d7502b19d4e7b1a253f40238d1b8db87181abda57cc3b0 · sha256:b3ba5bf9c57cfbf6… · /containers/cna/references/0
{"name":"VulnCheck Advisory: n8n before 2.30.1 Missing OAuth Authorization Check","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/n8n-before-missing-oauth-authorization-check"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9e5657abec591f0a71d7502b19d4e7b1a253f40238d1b8db87181abda57cc3b0 · sha256:b3ba5bf9c57cfbf6… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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