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CVE-2026-85166

n8n before 2.36.2 Credential Exfiltration via Workflow Tool Node

Description

n8n before 2.35.4 and 2.36.x before 2.36.2 does not validate credential references in the inline workflow JSON of nodes that execute an inline sub-workflow (e.g., the Workflow Tool node). A shared-workflow editor, or any user creating/updating a workflow via the REST API, Public API, or MCP, can persist a node referencing a credential they do not own. When the workflow is later executed under an identity that holds the credential, the inline sub-workflow resolves the secret and can send it to an attacker-controlled endpoint, resulting in credential exfiltration.

Timeline

  1. ID reserved

    By VulnCheck

  2. Published

  3. · 56 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-85166, by who scored it
Scored byCVSSScoreVector
VulnCheckCNA (assigner)4.0High7.2CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:L
NVDNVD · Analyzed4.0High7.2CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:L/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
EPSS (exploitation in 30 days)
0.36% · top 70% of all CVEs (11 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.2.

Affected products

  • n8n-io · n8n

    • affected 2.36.0 – < 2.36.2
    • unaffected 2.36.2
  • n8n-io · n8n

    • affected < 2.35.4
    • unaffected 2.35.4

References

References2

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .