CVE-2026-86077

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    CVE-2026-86077

    Published: 8 Sept 2026Last Modified: 13 Sept 2026

    Summary: n8n: Anonymous Approval-Gate Bypass via Reused resumeToken over the Chat WebSocket

    Details: n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the /chat WebSocket route accepted a resumeToken and resumed a paused execution without checking that the target node supported chat messages. An anonymous form submitter who received that token could reuse it on the chat route to release a Send-and-Wait, non-chat HITL, or Wait approval gate. The affected authorization logic is packages/cli/src/chat/chat-execution-manager.ts, where canResumeOverChat did not gate the resume target. This issue is fixed in versions 2.37.7 and 2.38.2.

    References: https://github.com/n8n-io/n8n/releases/tag/[email protected], https://github.com/n8n-io/n8n/releases/tag/[email protected], https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86077.json, https://github.com/n8n-io/n8n/security/advisories/GHSA-35jj-42hp-8gmq, https://nvd.nist.gov/vuln/detail/CVE-2026-86077

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -2a4ca7868dc75edca4c575d6507021e1e6b0ec90

    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
    CVE-2026-86077 | CVE-DB