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    CVE-2026-126389

    n8n before 1.123.89 contains an authentication bypass vulnerability in the Chat Trigger that allows unauthenticated attackers to skip n8n User Auth through the setup GET webhook route in embedded chat mode. Attackers can send unauthenticated GET requests to the chat webhook URL to read named session conversation history or trigger workflows with attacker-supplied input.

    Published:Nov 13, 2026
    Last Modified:Nov 13, 2026
    EPS:Nov 13, 2026
    EPSS Score:
    CVSS Score:5.4

    Affected Products

    Vendor
    N8n
    Product
    N8n

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-127 Directory Indexing
    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Related CVEs

    CVE-2026-126381 (CVSS 4.9) — n8n before 2.43.5, 2.44.x before 2.44.1, and 3.x before 3.0.1 contains an SQL injection vulnerability in the V…
    CVE-2026-126382 (CVSS 6.3) — n8n before 2.38.0 and 3.x before 3.0.1 contains a missing authentication vulnerability in the Asana Trigger th…
    CVE-2026-126383 (CVSS 5.3) — n8n before 1.123.89, 2.x before 2.45.5, 2.46.x before 2.46.1, and 3.x before 3.0.1 contains a NoSQL injection …
    CVE-2026-126384 (CVSS 7.7) — n8n before 1.123.89, 2.x before 2.45.5, 2.46.x before 2.46.1, and 3.x before 3.0.1 bundles a GraphicsMagick ve…
    CVE-2026-126385 (CVSS 4.8) — n8n before 2.45.5, 2.46.x before 2.46.1, and 3.x before 3.0.1 contains a flaw in the OAuth2 credential callbac…
    CVE-2026-126386 (CVSS 5.1) — n8n before 1.123.89, 2.x before 2.45.5, 2.46.x before 2.46.1, and 3.x before 3.0.1 contains an open redirect v…
    CVE-2026-126387 (CVSS 6) — n8n before 2.46.1 contains an arbitrary file read vulnerability that allows authenticated members to read serv…
    CVE-2026-126388 (CVSS 6.3) — n8n before 2.46.1 contains a credential exposure vulnerability that forwards Authorization headers and basic a…
    CVE-2026-126390 (CVSS 6.3) — n8n before 1.123.89 contains a credential leakage vulnerability in the NocoDB node that sends the configured N…
    CVE-2026-126391 (CVSS 7.7) — n8n before 1.123.89 contains an insufficient isolation vulnerability in workflow expression evaluation that al…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High