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CVE-2026-54309

n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, when @n8n/mcp-browser is run in HTTP transport mode, the MCP endpoint accepts session initialization and tool invocation requests without any authentication. Any network-reachable client, or any website visited by the user, can establish an MCP session and invoke browser-control tools. Where the n8n AI Browser Bridge extension is installed and a browser connection is active, an unauthenticated caller can access brows
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4cbbab2e3180ba36e6e20d01391f146405eae83e922345371be64c90a5e9f1ec
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"n8n","vendor":"n8n-io","versions":[{"status":"affected","version":">= 2.26.0, < 2.26.2"},{"status":"affected","version":"< 2.25.7"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8baacb2a3ba21e50c78cda291a6419f911ce2bcf94d1a79dbde08196846ef891 · sha256:e8aa09c5ef2ee1e2… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.8,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8baacb2a3ba21e50c78cda291a6419f911ce2bcf94d1a79dbde08196846ef891 · sha256:e8aa09c5ef2ee1e2… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8baacb2a3ba21e50c78cda291a6419f911ce2bcf94d1a79dbde08196846ef891 · sha256:e8aa09c5ef2ee1e2… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/n8n-io/n8n/security/advisories/GHSA-qrx8-25qr-5r7v","tags":["x_refsource_CONFIRM"],"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-qrx8-25qr-5r7v"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8baacb2a3ba21e50c78cda291a6419f911ce2bcf94d1a79dbde08196846ef891 · sha256:e8aa09c5ef2ee1e2… · /containers/cna/references/0

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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