VulnSocial

CVE-2026-42230Disclosure(n8n / n8n)

LOWCVSS 6.1 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, the /mcp-oauth/register endpoint accepted OAuth client registrations without authentication, allowing arbitrary redirect_uri values to be registered. When a user denies the MCP OAuth consent dialog, the handleDeny handler redirects the user to the registered redirect_uri without validation, enabling an open redirect to an attacker-controlled URL. An attacker can craft a phishing link and send it to a victim; if the victim clicks "Deny" on the consent page, they are silently redirected to an external site. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1.

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0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-601

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • n8n

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • Peaked 1d ago at 2 mentions (2026-05-04); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
n8n
Products
n8n

1 version affected across 1 product

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-05-04: 2Mentions · 2026-05-05: 1Technical Details · 2026-05-04: 2Technical Details · 2026-05-05: 105-0405-05
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-05-042
Disclosure2
2026-05-051
Disclosure1
Full discourse3 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-42230 n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, the /mcp-oauth/register endpoint accepted OAuth client registratio… https://www.cve.org/CVERecord?id=CVE-2026-42230 ----- Traducción: CVE-2026-42230 n8n… http://infoflow.cloud`

    Post summary

    The tweet highlights CVE-2026-42230, pointing out that n8n's /mcp-oauth/register endpoint was vulnerable before certain releases, but provides no exploits, patches, or proof-of-concept details.

    0001033
    75 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-42230 n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, the /mcp-oauth/register endpoint accepted OAuth client registratio… https://www.cve.org/CVERecord?id=CVE-2026-42230

    Post summary

    The tweet announces CVE‑2026‑42230, detailing that prior to specific releases of n8n the /mcp‑oauth/register endpoint incorrectly accepted OAuth client registrations. No PoC, exploit code, active exploitation, or patch information is included.

    00010165
    57.4K followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-42230 Unauthenticated Open Redirect via OAuth Registration in n8n Workflow Automation Platform https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-42230

    Post summary

    The post announces CVE-2026-42230 as an unauthenticated open redirect vulnerability in n8n’s OAuth registration, offering no PoC, exploit code, or mitigation details.

    0000039
    4.0K followersView on X
CPE platform detail2 entries

2 of 2 entries

PartVendorProductVersionTarget SWTarget HW
Appn8nn8n-node.js-
Appn8nn8n2.18.0node.js-

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